TY  - CONF
AU  - Atanasoski, Vladimir
AU  - Lazović, Aleksandar
AU  - Ivanović, Marija
AU  - Hadžievski, Ljupčo
AU  - Bojović, Boško
AU  - Petrović, Jovana
PY  - 2023
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/13045
AB  - Photoplethysmography (PPG) has become a standard method for assessment of blood volume changes in clinical care and heart rate in home care [1]. Besides the pulse rate, PPG pulse forms carry signatures of diagnostically relevant events in cardiac cycle and can be used to estimate arterial stiffness. Extraction of these features requires removal of noise, motion artifacts and the superimposed slow varying signals, such as that from breathing, from the signal while preserving pulse morphology. However, modern filtering methods often fail to reproduce all signal features. Here, we propose a novel noise–removal method based on autocorrelation. Autocorrelation is a well-known method used in optics, mainly for estimating the duration of ultrashort laser pulses. We used autocorrelation to remove the noise and baseline wander (BLW) from a set of bioelectrical signals, namely electrocardiogram (ECG) and PPG. These signals comprise pulses (or beats) repeated in time but with slight changes. When we record several such beats and by averaging them get a noise-free signal with distorted morphology. However, taking a few steps further, namely subtracting the average from the original signal and filtering the difference in the frequency domain, enables the noise and BLW extraction from the original signal and reproduction of a faithful noise-free signal. We tested this method on the private ECG database, where added BLW component is from public MIT-NST database, and on the private PPG signals. The results show the superiority of our approach compared to the conventional cubic spline (CSP) method.
PB  - Belgrade : Institute of Physics
C3  - 16th Photonics Workshop : Book of abstracts
T1  - Autocorrelation for denoising biomedical signals
SP  - 25
EP  - 25
UR  - https://hdl.handle.net/21.15107/rcub_vinar_13045
ER  - 

@conference{
author = "Atanasoski, Vladimir and Lazović, Aleksandar and Ivanović, Marija and Hadžievski, Ljupčo and Bojović, Boško and Petrović, Jovana",
year = "2023",
abstract = "Photoplethysmography (PPG) has become a standard method for assessment of blood volume changes in clinical care and heart rate in home care [1]. Besides the pulse rate, PPG pulse forms carry signatures of diagnostically relevant events in cardiac cycle and can be used to estimate arterial stiffness. Extraction of these features requires removal of noise, motion artifacts and the superimposed slow varying signals, such as that from breathing, from the signal while preserving pulse morphology. However, modern filtering methods often fail to reproduce all signal features. Here, we propose a novel noise–removal method based on autocorrelation. Autocorrelation is a well-known method used in optics, mainly for estimating the duration of ultrashort laser pulses. We used autocorrelation to remove the noise and baseline wander (BLW) from a set of bioelectrical signals, namely electrocardiogram (ECG) and PPG. These signals comprise pulses (or beats) repeated in time but with slight changes. When we record several such beats and by averaging them get a noise-free signal with distorted morphology. However, taking a few steps further, namely subtracting the average from the original signal and filtering the difference in the frequency domain, enables the noise and BLW extraction from the original signal and reproduction of a faithful noise-free signal. We tested this method on the private ECG database, where added BLW component is from public MIT-NST database, and on the private PPG signals. The results show the superiority of our approach compared to the conventional cubic spline (CSP) method.",
publisher = "Belgrade : Institute of Physics",
journal = "16th Photonics Workshop : Book of abstracts",
title = "Autocorrelation for denoising biomedical signals",
pages = "25-25",
url = "https://hdl.handle.net/21.15107/rcub_vinar_13045"
}

Atanasoski, V., Lazović, A., Ivanović, M., Hadžievski, L., Bojović, B.,& Petrović, J.. (2023). Autocorrelation for denoising biomedical signals. in 16th Photonics Workshop : Book of abstracts
Belgrade : Institute of Physics., 25-25.
https://hdl.handle.net/21.15107/rcub_vinar_13045

Atanasoski V, Lazović A, Ivanović M, Hadžievski L, Bojović B, Petrović J. Autocorrelation for denoising biomedical signals. in 16th Photonics Workshop : Book of abstracts. 2023;:25-25.
https://hdl.handle.net/21.15107/rcub_vinar_13045 .

Atanasoski, Vladimir, Lazović, Aleksandar, Ivanović, Marija, Hadžievski, Ljupčo, Bojović, Boško, Petrović, Jovana, "Autocorrelation for denoising biomedical signals" in 16th Photonics Workshop : Book of abstracts (2023):25-25,
https://hdl.handle.net/21.15107/rcub_vinar_13045 .

TY  - JOUR
AU  - Shvilkin, Alexei
AU  - Vukajlović, Dejan
AU  - Bojović, Boško P.
AU  - Hadžievski, Ljupčo
AU  - Vajdic, Branislav
AU  - Atanasoski, Vladimir
AU  - Miletić, Marjan
AU  - Zimetbaum, Peter J.
AU  - Gibson, C. Michael
AU  - Vukčević, Vladan
PY  - 2023
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/12393
AB  - Background Early coronary occlusion detection by portable personal device with limited number of electrocardiographic (ECG) leads might shorten symptom-to-balloon time in acute coronary syndromes.  Objectives The purpose of this study was to compare the accuracy of coronary occlusion detection using vectorcardgiographic analysis of a near-orthogonal 3-lead ECG configuration suitable for credit card-size personal device integration with automated and human 12 lead ECG interpretation.  Methods The 12-lead ECGs with 3 additional leads (“abc”) using 2 arm and 2 left parasternal electrodes were recorded in 66 patients undergoing percutaneous coronary intervention prior to (“baseline”, n = 66), immediately before (“preinflation”, n = 66), and after 90-second balloon coronary occlusion (“inflation”, n = 120). Performance of computer-measured ST-segment shift on vectorcardgiographic loops constructed from “abc” and 12 leads, standard 12-lead ECG, and consensus human interpretation in coronary occlusion detection were compared in “comparative” and “spot” modes (with/without reference to “baseline”) using areas under ROC curves (AUC), reliability, and sensitivity/specificity analysis.  Results Comparative “abc”-derived ST-segment shift was similar to two 12-lead methods (vector/traditional) in detecting balloon coronary occlusion (AUC = 0.95, 0.96, and 0.97, respectively, P = NS). Spot “abc” and 12-lead measurements (AUC = 0.72, 0.77, 0.68, respectively, P = NS) demonstrated poorer performance (P < 0.01 vs comparative measurements). Reliability analysis demonstrated comparative automated measurements in “good” agreement with reference (preinflation/inflation), while comparative human interpretation was in “moderate” range. Spot automated and human reading showed “poor” agreement.  Conclusions Vectorcardiographic ST-segment analysis using baseline comparison of 3-lead ECG system suitable for credit card-size personal device integration is similar to established 12-lead ECG methods in detecting balloon coronary occlusion.
T2  - JACC: Advances
T1  - Coronary Artery Occlusion Detection Using 3-Lead ECG System Suitable for Credit Card-Size Personal Device Integration
VL  - 2
IS  - 6
SP  - 100454
DO  - 10.1016/j.jacadv.2023.100454
ER  - 

@article{
author = "Shvilkin, Alexei and Vukajlović, Dejan and Bojović, Boško P. and Hadžievski, Ljupčo and Vajdic, Branislav and Atanasoski, Vladimir and Miletić, Marjan and Zimetbaum, Peter J. and Gibson, C. Michael and Vukčević, Vladan",
year = "2023",
abstract = "Background Early coronary occlusion detection by portable personal device with limited number of electrocardiographic (ECG) leads might shorten symptom-to-balloon time in acute coronary syndromes.  Objectives The purpose of this study was to compare the accuracy of coronary occlusion detection using vectorcardgiographic analysis of a near-orthogonal 3-lead ECG configuration suitable for credit card-size personal device integration with automated and human 12 lead ECG interpretation.  Methods The 12-lead ECGs with 3 additional leads (“abc”) using 2 arm and 2 left parasternal electrodes were recorded in 66 patients undergoing percutaneous coronary intervention prior to (“baseline”, n = 66), immediately before (“preinflation”, n = 66), and after 90-second balloon coronary occlusion (“inflation”, n = 120). Performance of computer-measured ST-segment shift on vectorcardgiographic loops constructed from “abc” and 12 leads, standard 12-lead ECG, and consensus human interpretation in coronary occlusion detection were compared in “comparative” and “spot” modes (with/without reference to “baseline”) using areas under ROC curves (AUC), reliability, and sensitivity/specificity analysis.  Results Comparative “abc”-derived ST-segment shift was similar to two 12-lead methods (vector/traditional) in detecting balloon coronary occlusion (AUC = 0.95, 0.96, and 0.97, respectively, P = NS). Spot “abc” and 12-lead measurements (AUC = 0.72, 0.77, 0.68, respectively, P = NS) demonstrated poorer performance (P < 0.01 vs comparative measurements). Reliability analysis demonstrated comparative automated measurements in “good” agreement with reference (preinflation/inflation), while comparative human interpretation was in “moderate” range. Spot automated and human reading showed “poor” agreement.  Conclusions Vectorcardiographic ST-segment analysis using baseline comparison of 3-lead ECG system suitable for credit card-size personal device integration is similar to established 12-lead ECG methods in detecting balloon coronary occlusion.",
journal = "JACC: Advances",
title = "Coronary Artery Occlusion Detection Using 3-Lead ECG System Suitable for Credit Card-Size Personal Device Integration",
volume = "2",
number = "6",
pages = "100454",
doi = "10.1016/j.jacadv.2023.100454"
}

Shvilkin, A., Vukajlović, D., Bojović, B. P., Hadžievski, L., Vajdic, B., Atanasoski, V., Miletić, M., Zimetbaum, P. J., Gibson, C. M.,& Vukčević, V.. (2023). Coronary Artery Occlusion Detection Using 3-Lead ECG System Suitable for Credit Card-Size Personal Device Integration. in JACC: Advances, 2(6), 100454.
https://doi.org/10.1016/j.jacadv.2023.100454

Shvilkin A, Vukajlović D, Bojović BP, Hadžievski L, Vajdic B, Atanasoski V, Miletić M, Zimetbaum PJ, Gibson CM, Vukčević V. Coronary Artery Occlusion Detection Using 3-Lead ECG System Suitable for Credit Card-Size Personal Device Integration. in JACC: Advances. 2023;2(6):100454.
doi:10.1016/j.jacadv.2023.100454 .

Shvilkin, Alexei, Vukajlović, Dejan, Bojović, Boško P., Hadžievski, Ljupčo, Vajdic, Branislav, Atanasoski, Vladimir, Miletić, Marjan, Zimetbaum, Peter J., Gibson, C. Michael, Vukčević, Vladan, "Coronary Artery Occlusion Detection Using 3-Lead ECG System Suitable for Credit Card-Size Personal Device Integration" in JACC: Advances, 2, no. 6 (2023):100454,
https://doi.org/10.1016/j.jacadv.2023.100454 . .

TY  - JOUR
AU  - Popović Maneski, Lana
AU  - Ivanović, Marija D.
AU  - Atanasoski, Vladimir
AU  - Miletić, Marjan
AU  - Zdolšek, Sanja
AU  - Bojović, Boško
AU  - Hadžievski, Ljupčo
PY  - 2020
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8940
AB  - Wearable smart monitors (WSMs) applied for the estimation of electrophysiological signals are of utmost interest for a non-stressed life. WSM which records heart muscle activities could signalize timely a life-threatening event. The heart muscle activities are typically recorded across the heart at the surface of the body; hence, a WSM monitor requires high-quality surface electrodes. The electrodes used in the clinical settings [i.e. silver/silver chloride (Ag/AgCl) with the gel] are not practical for the daily out of clinic usage. A practical WSM requires the application of a dry electrode with stable and reproducible electrical characteristics. We compared the characteristics of six types of dry electrodes and one gelled electrode during short-term recordings sessions (≈30 s) in real-life conditions: Orbital, monolithic polymer plated with Ag/AgCl, and five rectangular shaped 10 × 6 × 2 mm electrodes (Orbital, Ag electrode, Ag/AgCl electrode, gold electrode and stainless-steel AISI304). The results of a well-controlled analysis which considered motion artifacts, line noise and junction potentials suggest that among the dry electrodes Ag/AgCl performs the best. The Ag/AgCl electrode is in average three times better compared with the stainless-steel electrode often used in WSMs.
T2  - Biomedical Engineering / Biomedizinische Technik
T1  - Properties of different types of dry electrodes for wearable smart monitoring devices
VL  - 65
IS  - 4
SP  - 405
EP  - 415
DO  - 10.1515/bmt-2019-0167
ER  - 

@article{
author = "Popović Maneski, Lana and Ivanović, Marija D. and Atanasoski, Vladimir and Miletić, Marjan and Zdolšek, Sanja and Bojović, Boško and Hadžievski, Ljupčo",
year = "2020",
abstract = "Wearable smart monitors (WSMs) applied for the estimation of electrophysiological signals are of utmost interest for a non-stressed life. WSM which records heart muscle activities could signalize timely a life-threatening event. The heart muscle activities are typically recorded across the heart at the surface of the body; hence, a WSM monitor requires high-quality surface electrodes. The electrodes used in the clinical settings [i.e. silver/silver chloride (Ag/AgCl) with the gel] are not practical for the daily out of clinic usage. A practical WSM requires the application of a dry electrode with stable and reproducible electrical characteristics. We compared the characteristics of six types of dry electrodes and one gelled electrode during short-term recordings sessions (≈30 s) in real-life conditions: Orbital, monolithic polymer plated with Ag/AgCl, and five rectangular shaped 10 × 6 × 2 mm electrodes (Orbital, Ag electrode, Ag/AgCl electrode, gold electrode and stainless-steel AISI304). The results of a well-controlled analysis which considered motion artifacts, line noise and junction potentials suggest that among the dry electrodes Ag/AgCl performs the best. The Ag/AgCl electrode is in average three times better compared with the stainless-steel electrode often used in WSMs.",
journal = "Biomedical Engineering / Biomedizinische Technik",
title = "Properties of different types of dry electrodes for wearable smart monitoring devices",
volume = "65",
number = "4",
pages = "405-415",
doi = "10.1515/bmt-2019-0167"
}

Popović Maneski, L., Ivanović, M. D., Atanasoski, V., Miletić, M., Zdolšek, S., Bojović, B.,& Hadžievski, L.. (2020). Properties of different types of dry electrodes for wearable smart monitoring devices. in Biomedical Engineering / Biomedizinische Technik, 65(4), 405-415.
https://doi.org/10.1515/bmt-2019-0167

Popović Maneski L, Ivanović MD, Atanasoski V, Miletić M, Zdolšek S, Bojović B, Hadžievski L. Properties of different types of dry electrodes for wearable smart monitoring devices. in Biomedical Engineering / Biomedizinische Technik. 2020;65(4):405-415.
doi:10.1515/bmt-2019-0167 .

Popović Maneski, Lana, Ivanović, Marija D., Atanasoski, Vladimir, Miletić, Marjan, Zdolšek, Sanja, Bojović, Boško, Hadžievski, Ljupčo, "Properties of different types of dry electrodes for wearable smart monitoring devices" in Biomedical Engineering / Biomedizinische Technik, 65, no. 4 (2020):405-415,
https://doi.org/10.1515/bmt-2019-0167 . .

TY  - CONF
AU  - Miletić, M.
AU  - Kršić, Jelena
AU  - Atanasoski, Vladimir
AU  - Ivanović, Marija
AU  - Bojović, Boško
PY  - 2019
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/11880
AB  - Apexcardiogram (ACG) represents record of low-frequency vibrations of the precordium caused by heart contractions. The information obtained from ACG is mostly related to left ventricular contractions. The most common position for its measurement is in parasternal area of chest wall, above the apex of the heart. The measurement of ACG can provide date significant in timing of systolic events of the cardiac cycle. Particulary, ACG is used as aid in timing of the opening snap of the cardiac valves, for the identification of the exact timing of the third (S3) and fourth heart sounds (S4) and for early diagnosis of the mitral valve stenosis or regurgitation [1]. The frequently used methods for non-invasively recording of ACG include using of electro manometer sensor, piezoelectric microphone sensor and crystal-microphone sensor for measuring mechanical displacements of chest wall [2]. The disadvantages of these sensors are potential noise caused by electrical interference and technical difficulties in their application on body surface. The goal of this study is to evaluate possibility of using long-period grating (LPG) sensor as potential non-invasive method for ACG recording. The advantages of utilizing LPG sensors are their low cost, utilization simplicity, and insensitivity to electrical interference. The study protocol includes measurements on group of healthy volunteers utilizing a single LPG sensor. LPG sensor is positioned in paternal area of chest wall, above the apex of the heart and fixed with the elastic bandage. It is used as a sensor of mechanical pulsation on the body surface. All healthy volunteers are asked to hold their breath in mid-expiration phase for at least 10 seconds in order to avoid the interference of the ACG with a breathing signal. Our results show that we are able to record signals with morphology of normal ACG repeatably on each healthy volunteer, and with the significant signal-to-noise ratio. Hence, we can conclude that LPG sensors can be used for recording ACG by measuring mechanical low-frequency vibrations of the precordium on the body surface above the apex of the heart.
PB  - Belgrade : Vinča Institute of Nuclear Sciences, University of Belgrade
C3  - PHOTONICA2019 : 7th International School and Conference on Photonics & Machine Learning with Photonics Symposium : Book of abstracts
T1  - Long-period grating sensors for the measurement of apexcardiogram
SP  - 131
EP  - 131
UR  - https://hdl.handle.net/21.15107/rcub_vinar_11880
ER  - 

@conference{
author = "Miletić, M. and Kršić, Jelena and Atanasoski, Vladimir and Ivanović, Marija and Bojović, Boško",
year = "2019",
abstract = "Apexcardiogram (ACG) represents record of low-frequency vibrations of the precordium caused by heart contractions. The information obtained from ACG is mostly related to left ventricular contractions. The most common position for its measurement is in parasternal area of chest wall, above the apex of the heart. The measurement of ACG can provide date significant in timing of systolic events of the cardiac cycle. Particulary, ACG is used as aid in timing of the opening snap of the cardiac valves, for the identification of the exact timing of the third (S3) and fourth heart sounds (S4) and for early diagnosis of the mitral valve stenosis or regurgitation [1]. The frequently used methods for non-invasively recording of ACG include using of electro manometer sensor, piezoelectric microphone sensor and crystal-microphone sensor for measuring mechanical displacements of chest wall [2]. The disadvantages of these sensors are potential noise caused by electrical interference and technical difficulties in their application on body surface. The goal of this study is to evaluate possibility of using long-period grating (LPG) sensor as potential non-invasive method for ACG recording. The advantages of utilizing LPG sensors are their low cost, utilization simplicity, and insensitivity to electrical interference. The study protocol includes measurements on group of healthy volunteers utilizing a single LPG sensor. LPG sensor is positioned in paternal area of chest wall, above the apex of the heart and fixed with the elastic bandage. It is used as a sensor of mechanical pulsation on the body surface. All healthy volunteers are asked to hold their breath in mid-expiration phase for at least 10 seconds in order to avoid the interference of the ACG with a breathing signal. Our results show that we are able to record signals with morphology of normal ACG repeatably on each healthy volunteer, and with the significant signal-to-noise ratio. Hence, we can conclude that LPG sensors can be used for recording ACG by measuring mechanical low-frequency vibrations of the precordium on the body surface above the apex of the heart.",
publisher = "Belgrade : Vinča Institute of Nuclear Sciences, University of Belgrade",
journal = "PHOTONICA2019 : 7th International School and Conference on Photonics & Machine Learning with Photonics Symposium : Book of abstracts",
title = "Long-period grating sensors for the measurement of apexcardiogram",
pages = "131-131",
url = "https://hdl.handle.net/21.15107/rcub_vinar_11880"
}

Miletić, M., Kršić, J., Atanasoski, V., Ivanović, M.,& Bojović, B.. (2019). Long-period grating sensors for the measurement of apexcardiogram. in PHOTONICA2019 : 7th International School and Conference on Photonics & Machine Learning with Photonics Symposium : Book of abstracts
Belgrade : Vinča Institute of Nuclear Sciences, University of Belgrade., 131-131.
https://hdl.handle.net/21.15107/rcub_vinar_11880

Miletić M, Kršić J, Atanasoski V, Ivanović M, Bojović B. Long-period grating sensors for the measurement of apexcardiogram. in PHOTONICA2019 : 7th International School and Conference on Photonics & Machine Learning with Photonics Symposium : Book of abstracts. 2019;:131-131.
https://hdl.handle.net/21.15107/rcub_vinar_11880 .

Miletić, M., Kršić, Jelena, Atanasoski, Vladimir, Ivanović, Marija, Bojović, Boško, "Long-period grating sensors for the measurement of apexcardiogram" in PHOTONICA2019 : 7th International School and Conference on Photonics & Machine Learning with Photonics Symposium : Book of abstracts (2019):131-131,
https://hdl.handle.net/21.15107/rcub_vinar_11880 .

TY  - JOUR
AU  - Ivanović, Marija D.
AU  - Petrović, Jovana S.
AU  - Savić, Andrej
AU  - Gligorić, Goran
AU  - Miletić, Marjan
AU  - Vukčević, Miodrag
AU  - Bojović, Boško
AU  - Hadžievski, Ljupčo
AU  - Allsop, Thomas P.
AU  - Webb, David J.
PY  - 2018
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/7637
AB  - Objective: The ventilators involved in non-invasive mechanical ventilation commonly provide ventilator support via a facemask. The interface of the mask with a patient promotes air leaks that cause errors in the feedback information provided by a pneumatic sensor and hence patient-ventilator asynchrony with multiple negative consequences. Our objective is to test the possibility of using chest-wall motion measured by an optical fibre-grating sensor as a more accurate non-invasive ventilator triggering mechanism. Approach: The basic premise of our approach is that the measurement accuracy can be improved by using a triggering signal that precedes pneumatic triggering in the neuro-ventilatory coupling sequence. We propose a technique that uses the measurement of chest-wall curvature by a long-period fibre-grating sensor. The sensor was applied externally to the rib-cage and interrogated in the lateral (edge) filtering scheme. The study was performed on 34 healthy volunteers. Statistical data analysis of the time lag between the fibregrating sensor and the reference pneumotachograph was preceded by the removal of the unwanted heartbeat signal by wavelet transform processing. Main results: The results show a consistent fibregrating signal advance with respect to the standard pneumatic signal by (230 +/- 100) ms in both the inspiratory and expiratory phases. We further show that heart activity removal yields a tremendous improvement in sensor accuracy by reducing it from 60 ml to 0.3 ml. Significance: The results indicate that the proposed measurement technique may lead to a more reliable triggering decision. Its imperviousness to air leaks, non-invasiveness, low-cost and ease of implementation offer good prospects for applications in both clinical and homecare ventilation.
T2  - Physiological Measurement
T1  - Real-time chest-wall-motion tracking by a single optical fibre grating: a prospective method for ventilator triggering
VL  - 39
IS  - 4
SP  - 045009
DO  - 10.1088/1361-6579/aab7ac
ER  - 

@article{
author = "Ivanović, Marija D. and Petrović, Jovana S. and Savić, Andrej and Gligorić, Goran and Miletić, Marjan and Vukčević, Miodrag and Bojović, Boško and Hadžievski, Ljupčo and Allsop, Thomas P. and Webb, David J.",
year = "2018",
abstract = "Objective: The ventilators involved in non-invasive mechanical ventilation commonly provide ventilator support via a facemask. The interface of the mask with a patient promotes air leaks that cause errors in the feedback information provided by a pneumatic sensor and hence patient-ventilator asynchrony with multiple negative consequences. Our objective is to test the possibility of using chest-wall motion measured by an optical fibre-grating sensor as a more accurate non-invasive ventilator triggering mechanism. Approach: The basic premise of our approach is that the measurement accuracy can be improved by using a triggering signal that precedes pneumatic triggering in the neuro-ventilatory coupling sequence. We propose a technique that uses the measurement of chest-wall curvature by a long-period fibre-grating sensor. The sensor was applied externally to the rib-cage and interrogated in the lateral (edge) filtering scheme. The study was performed on 34 healthy volunteers. Statistical data analysis of the time lag between the fibregrating sensor and the reference pneumotachograph was preceded by the removal of the unwanted heartbeat signal by wavelet transform processing. Main results: The results show a consistent fibregrating signal advance with respect to the standard pneumatic signal by (230 +/- 100) ms in both the inspiratory and expiratory phases. We further show that heart activity removal yields a tremendous improvement in sensor accuracy by reducing it from 60 ml to 0.3 ml. Significance: The results indicate that the proposed measurement technique may lead to a more reliable triggering decision. Its imperviousness to air leaks, non-invasiveness, low-cost and ease of implementation offer good prospects for applications in both clinical and homecare ventilation.",
journal = "Physiological Measurement",
title = "Real-time chest-wall-motion tracking by a single optical fibre grating: a prospective method for ventilator triggering",
volume = "39",
number = "4",
pages = "045009",
doi = "10.1088/1361-6579/aab7ac"
}

Ivanović, M. D., Petrović, J. S., Savić, A., Gligorić, G., Miletić, M., Vukčević, M., Bojović, B., Hadžievski, L., Allsop, T. P.,& Webb, D. J.. (2018). Real-time chest-wall-motion tracking by a single optical fibre grating: a prospective method for ventilator triggering. in Physiological Measurement, 39(4), 045009.
https://doi.org/10.1088/1361-6579/aab7ac

Ivanović MD, Petrović JS, Savić A, Gligorić G, Miletić M, Vukčević M, Bojović B, Hadžievski L, Allsop TP, Webb DJ. Real-time chest-wall-motion tracking by a single optical fibre grating: a prospective method for ventilator triggering. in Physiological Measurement. 2018;39(4):045009.
doi:10.1088/1361-6579/aab7ac .

Ivanović, Marija D., Petrović, Jovana S., Savić, Andrej, Gligorić, Goran, Miletić, Marjan, Vukčević, Miodrag, Bojović, Boško, Hadžievski, Ljupčo, Allsop, Thomas P., Webb, David J., "Real-time chest-wall-motion tracking by a single optical fibre grating: a prospective method for ventilator triggering" in Physiological Measurement, 39, no. 4 (2018):045009,
https://doi.org/10.1088/1361-6579/aab7ac . .

TY  - CONF
AU  - Atanasoski, Vladimir
AU  - Ivanović, Marija D.
AU  - Marinković, Miloš
AU  - Gligorić, Goran
AU  - Bojović, Boško
AU  - Shvilkin, Alexei V.
AU  - Petrović, Jovana S.
PY  - 2018
UR  - https://ieeexplore.ieee.org/document/8586997/
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8050
AB  - Accurate automated detection of premature ventricular contractions from electrocardiogram requires a training set or expert intervention. We propose a fully automated unsupervised detection method. The algorithm first clusters morphologically similar heartbeats and then performs classification based on RR intervals and morphology. Tests on clinically recorded datasets show sensitivity of 94.7%, specificity of 99.6% and accuracy of 99.5%. © 2018 IEEE.
PB  - IEEE
C3  - 2018 14th Symposium on Neural Networks and Applications (NEUREL)
C3  - 14th Symposium on Neural Networks and Applications (NEUREL) (2018)
T1  - Unsupervised Classification of Premature Ventricular Contractions Based on RR Interval and Heartbeat Morphology
SP  - 1
EP  - 6
DO  - 10.1109/NEUREL.2018.8586997
ER  - 

@conference{
author = "Atanasoski, Vladimir and Ivanović, Marija D. and Marinković, Miloš and Gligorić, Goran and Bojović, Boško and Shvilkin, Alexei V. and Petrović, Jovana S.",
year = "2018",
abstract = "Accurate automated detection of premature ventricular contractions from electrocardiogram requires a training set or expert intervention. We propose a fully automated unsupervised detection method. The algorithm first clusters morphologically similar heartbeats and then performs classification based on RR intervals and morphology. Tests on clinically recorded datasets show sensitivity of 94.7%, specificity of 99.6% and accuracy of 99.5%. © 2018 IEEE.",
publisher = "IEEE",
journal = "2018 14th Symposium on Neural Networks and Applications (NEUREL), 14th Symposium on Neural Networks and Applications (NEUREL) (2018)",
title = "Unsupervised Classification of Premature Ventricular Contractions Based on RR Interval and Heartbeat Morphology",
pages = "1-6",
doi = "10.1109/NEUREL.2018.8586997"
}

Atanasoski, V., Ivanović, M. D., Marinković, M., Gligorić, G., Bojović, B., Shvilkin, A. V.,& Petrović, J. S.. (2018). Unsupervised Classification of Premature Ventricular Contractions Based on RR Interval and Heartbeat Morphology. in 2018 14th Symposium on Neural Networks and Applications (NEUREL)
IEEE., 1-6.
https://doi.org/10.1109/NEUREL.2018.8586997

Atanasoski V, Ivanović MD, Marinković M, Gligorić G, Bojović B, Shvilkin AV, Petrović JS. Unsupervised Classification of Premature Ventricular Contractions Based on RR Interval and Heartbeat Morphology. in 2018 14th Symposium on Neural Networks and Applications (NEUREL). 2018;:1-6.
doi:10.1109/NEUREL.2018.8586997 .

Atanasoski, Vladimir, Ivanović, Marija D., Marinković, Miloš, Gligorić, Goran, Bojović, Boško, Shvilkin, Alexei V., Petrović, Jovana S., "Unsupervised Classification of Premature Ventricular Contractions Based on RR Interval and Heartbeat Morphology" in 2018 14th Symposium on Neural Networks and Applications (NEUREL) (2018):1-6,
https://doi.org/10.1109/NEUREL.2018.8586997 . .

TY  - CONF
AU  - Miletić, Marjan
AU  - Ivanović, Marija D.
AU  - Popović Maneski, Lana
AU  - Bojović, Boško
PY  - 2017
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/7565
AB  - Ejection fraction (EF) is the most used parameter for characterisation of Heart Failure (HF) condition. EF is commonly calculated using echocardiography, which is an expensive non–invasive method and not used in primary healthcare. Systolic time intervals (STI) represent a non-invasive and inexpensive method for determination of EF[1, 2]. Heart failure (HF) is the single most expensive diagnosis in medicine. 2–3% of adult population in developed countries have HF diagnosis. It is not detectable by ECG test and it is commonly detected in a late stage, when the process is irreversible [2-5]. In this paper, a multiparametric cardiac measurement system for determination of STI is presented. Measurement system consists of sensors for simultaneous acquisition of electrocardiographic (ECG), phonocardiographic (PCG), photopletysmographic (PPG) and cardiovascular (CV) pulsation signals. CV pulsation signals are measured by long period grating (LPG) fiber-optic sensors[6]. Two non-invasive methods for measuring systolic time intervals (STI) were applied on a set of 6 healthy volunteers, based on ECG, PCG and CV pulsation signals. CV pulsation signals were measured on carotide arthery with PPG and LPG sensors. In the first method, EF was calculated from the obtained STI signals, using CV carotide pulsations measured with the PPG sensor, giving EF values in the range from 0.60 to 0.68, with maximal standard deviation of 0.05. In the second method, EF was obtained using CV carotide pulsations measured with LPG sensor, giving EF values in the range from 0.60 to 0.66, with maximal standard deviation 0.06. Calculated values of EF with both methods were in the 0.55 to 0.75 range which corresponds to normal EF range in healthy individuals.
PB  - Belgrade : Institute of Physics Belgrade
C3  - PHOTONICA2017 : 6th International School and Conference on Photonics and COST actions: MP1406 and MP1402 : Program and the book of abstracts
T1  - Application of multiparametric cardiac measurement system in ejection fraction calculation
SP  - 112
UR  - https://hdl.handle.net/21.15107/rcub_vinar_7565
ER  - 

@conference{
editor = "Krmpot, Aleksandar J., Lekić, Marina",
author = "Miletić, Marjan and Ivanović, Marija D. and Popović Maneski, Lana and Bojović, Boško",
year = "2017",
abstract = "Ejection fraction (EF) is the most used parameter for characterisation of Heart Failure (HF) condition. EF is commonly calculated using echocardiography, which is an expensive non–invasive method and not used in primary healthcare. Systolic time intervals (STI) represent a non-invasive and inexpensive method for determination of EF[1, 2]. Heart failure (HF) is the single most expensive diagnosis in medicine. 2–3% of adult population in developed countries have HF diagnosis. It is not detectable by ECG test and it is commonly detected in a late stage, when the process is irreversible [2-5]. In this paper, a multiparametric cardiac measurement system for determination of STI is presented. Measurement system consists of sensors for simultaneous acquisition of electrocardiographic (ECG), phonocardiographic (PCG), photopletysmographic (PPG) and cardiovascular (CV) pulsation signals. CV pulsation signals are measured by long period grating (LPG) fiber-optic sensors[6]. Two non-invasive methods for measuring systolic time intervals (STI) were applied on a set of 6 healthy volunteers, based on ECG, PCG and CV pulsation signals. CV pulsation signals were measured on carotide arthery with PPG and LPG sensors. In the first method, EF was calculated from the obtained STI signals, using CV carotide pulsations measured with the PPG sensor, giving EF values in the range from 0.60 to 0.68, with maximal standard deviation of 0.05. In the second method, EF was obtained using CV carotide pulsations measured with LPG sensor, giving EF values in the range from 0.60 to 0.66, with maximal standard deviation 0.06. Calculated values of EF with both methods were in the 0.55 to 0.75 range which corresponds to normal EF range in healthy individuals.",
publisher = "Belgrade : Institute of Physics Belgrade",
journal = "PHOTONICA2017 : 6th International School and Conference on Photonics and COST actions: MP1406 and MP1402 : Program and the book of abstracts",
title = "Application of multiparametric cardiac measurement system in ejection fraction calculation",
pages = "112",
url = "https://hdl.handle.net/21.15107/rcub_vinar_7565"
}

Krmpot, A. J., Lekić, M., Miletić, M., Ivanović, M. D., Popović Maneski, L.,& Bojović, B.. (2017). Application of multiparametric cardiac measurement system in ejection fraction calculation. in PHOTONICA2017 : 6th International School and Conference on Photonics and COST actions: MP1406 and MP1402 : Program and the book of abstracts
Belgrade : Institute of Physics Belgrade., 112.
https://hdl.handle.net/21.15107/rcub_vinar_7565

Krmpot AJ, Lekić M, Miletić M, Ivanović MD, Popović Maneski L, Bojović B. Application of multiparametric cardiac measurement system in ejection fraction calculation. in PHOTONICA2017 : 6th International School and Conference on Photonics and COST actions: MP1406 and MP1402 : Program and the book of abstracts. 2017;:112.
https://hdl.handle.net/21.15107/rcub_vinar_7565 .

Krmpot, Aleksandar J., Lekić, Marina, Miletić, Marjan, Ivanović, Marija D., Popović Maneski, Lana, Bojović, Boško, "Application of multiparametric cardiac measurement system in ejection fraction calculation" in PHOTONICA2017 : 6th International School and Conference on Photonics and COST actions: MP1406 and MP1402 : Program and the book of abstracts (2017):112,
https://hdl.handle.net/21.15107/rcub_vinar_7565 .

TY  - CONF
AU  - Ivanović, Marija D.
AU  - Petrović, Jovana S.
AU  - Miletić, Marjan
AU  - Daničić, Aleksandar
AU  - Bojović, Boško
AU  - Vukcevic, M.
AU  - Lazovic, B.
AU  - Gluvić, Zoran
AU  - Hadžievski, Ljupčo
AU  - Allsop, Thomas P.
AU  - Webb, David J.
PY  - 2015
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/7097
AB  - Non-invasive ventilation performed through an oronasal mask is a standard in clinical and homecare mechanical ventilation. Besides all its advantages, inevitable leaks through the mask cause errors in the feedback information provided by the airflow sensor and, hence, patient-ventilator asynchrony with multiple negative consequences. Here we investigate a new way to provide a trigger to the ventilator. The method is based on the measurement of rib cage movement at the onset of inspiration and during breathing by fibre-optic sensors. In a series of simultaneous measurements by a long-period fibre grating sensor and pneumotachograph we provide the statistical evidence of the 200 ms lag of the pneumo with respect the fibre-optic signal. The lag is registered consistently across three independent delay metrics. Further, we discuss exceptions from this trend and identify the needed improvements to the proposed fibre-sensing scheme.
T1  - Rib-Cage-Movement Measurements as a Potential New Trigger Signal in Non-Invasive Mechanical Ventilation
SP  - 4511
EP  - 4514
UR  - https://hdl.handle.net/21.15107/rcub_vinar_7097
ER  - 

@conference{
author = "Ivanović, Marija D. and Petrović, Jovana S. and Miletić, Marjan and Daničić, Aleksandar and Bojović, Boško and Vukcevic, M. and Lazovic, B. and Gluvić, Zoran and Hadžievski, Ljupčo and Allsop, Thomas P. and Webb, David J.",
year = "2015",
abstract = "Non-invasive ventilation performed through an oronasal mask is a standard in clinical and homecare mechanical ventilation. Besides all its advantages, inevitable leaks through the mask cause errors in the feedback information provided by the airflow sensor and, hence, patient-ventilator asynchrony with multiple negative consequences. Here we investigate a new way to provide a trigger to the ventilator. The method is based on the measurement of rib cage movement at the onset of inspiration and during breathing by fibre-optic sensors. In a series of simultaneous measurements by a long-period fibre grating sensor and pneumotachograph we provide the statistical evidence of the 200 ms lag of the pneumo with respect the fibre-optic signal. The lag is registered consistently across three independent delay metrics. Further, we discuss exceptions from this trend and identify the needed improvements to the proposed fibre-sensing scheme.",
title = "Rib-Cage-Movement Measurements as a Potential New Trigger Signal in Non-Invasive Mechanical Ventilation",
pages = "4511-4514",
url = "https://hdl.handle.net/21.15107/rcub_vinar_7097"
}

Ivanović, M. D., Petrović, J. S., Miletić, M., Daničić, A., Bojović, B., Vukcevic, M., Lazovic, B., Gluvić, Z., Hadžievski, L., Allsop, T. P.,& Webb, D. J.. (2015). Rib-Cage-Movement Measurements as a Potential New Trigger Signal in Non-Invasive Mechanical Ventilation. , 4511-4514.
https://hdl.handle.net/21.15107/rcub_vinar_7097

Ivanović MD, Petrović JS, Miletić M, Daničić A, Bojović B, Vukcevic M, Lazovic B, Gluvić Z, Hadžievski L, Allsop TP, Webb DJ. Rib-Cage-Movement Measurements as a Potential New Trigger Signal in Non-Invasive Mechanical Ventilation. 2015;:4511-4514.
https://hdl.handle.net/21.15107/rcub_vinar_7097 .

Ivanović, Marija D., Petrović, Jovana S., Miletić, Marjan, Daničić, Aleksandar, Bojović, Boško, Vukcevic, M., Lazovic, B., Gluvić, Zoran, Hadžievski, Ljupčo, Allsop, Thomas P., Webb, David J., "Rib-Cage-Movement Measurements as a Potential New Trigger Signal in Non-Invasive Mechanical Ventilation" (2015):4511-4514,
https://hdl.handle.net/21.15107/rcub_vinar_7097 .

TY  - CONF
AU  - Ivanović, M. D.
AU  - Petrović, Jovana
AU  - Daničić, Aleksandar
AU  - Miletić, Marjan
AU  - Vukčević, Miodrag
AU  - Bojović, Boško
AU  - Hadžievski, Ljupčo
AU  - Allsop, Thomas
AU  - Webb, D. J.
PY  - 2015
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/12011
AB  - In the current clinical practice of non-invasive mechanical ventilation (NIV), continuous monitoring of respiratory volumes is based on the measurement of air flow through an oronasal mask or mouthpiece. Errors in respiratory-volumes monitoring and patientventilator asynchrony due to the inevitable air leaks from the mask may lead to insufficient ventilation and/or damage of the airway system. Therefore, clinician’s observations of the chest wall expansions are required, but they are subjective, time consuming and strongly dependent on clinician’s experience [1]. We present and validate a method for the measurement of respiratory volumes by a single long period fibre-grating (LPG) sensor of bending. This method is grounded on the hypothesis that the volume of the inhaled air can be correlated with the change in a local torso curvature in a ribs area with stiff underlying tissues. Here, we explain the working principle of the LPG sensors, a monochromatic interrogation scheme, a two-step calibration-test measurement procedure and present results that establish a linear correlation between the change in the local rib-cage curvature and the change in the lung volume. Results also show good sensor accuracy in measurements of tidal and minute respiratory volumes for all clinically relevant breathing volumes [2]. Additionally, we examine the possibility of using the rib-cage movement signal measured by a single LPG sensor as a new way to provide a trigger to the ventilator. Our preliminary results on healthy volunteers provide the statistical evidence of the 200 ms lag of the pneumotechometer with respect to the fibre-optic signal. The proposed single-sensor method is non-invasive, simple, low-cost and easy to implement. Moreover this method does not suffer from the flaws of air-flow measurements, it eliminates the need for chest movement observation by clinicians and can be implemented on both male and female patients. The preliminary results are promising and indicate that the method proposed here could be used in NIV.
PB  - Belgrade : Vinča Institute of Nuclear Sciences
C3  - PHOTONICA2015 : 5th International School and Conference on Photonics and COST actions: MP1204, BM1205 and MP1205 : book of abstracts; August 24-28, 2015; Belgrade
T1  - A long-period fibre grating sensor for respiratory monitoring
SP  - 168
EP  - 168
UR  - https://hdl.handle.net/21.15107/rcub_vinar_12011
ER  - 

@conference{
author = "Ivanović, M. D. and Petrović, Jovana and Daničić, Aleksandar and Miletić, Marjan and Vukčević, Miodrag and Bojović, Boško and Hadžievski, Ljupčo and Allsop, Thomas and Webb, D. J.",
year = "2015",
abstract = "In the current clinical practice of non-invasive mechanical ventilation (NIV), continuous monitoring of respiratory volumes is based on the measurement of air flow through an oronasal mask or mouthpiece. Errors in respiratory-volumes monitoring and patientventilator asynchrony due to the inevitable air leaks from the mask may lead to insufficient ventilation and/or damage of the airway system. Therefore, clinician’s observations of the chest wall expansions are required, but they are subjective, time consuming and strongly dependent on clinician’s experience [1]. We present and validate a method for the measurement of respiratory volumes by a single long period fibre-grating (LPG) sensor of bending. This method is grounded on the hypothesis that the volume of the inhaled air can be correlated with the change in a local torso curvature in a ribs area with stiff underlying tissues. Here, we explain the working principle of the LPG sensors, a monochromatic interrogation scheme, a two-step calibration-test measurement procedure and present results that establish a linear correlation between the change in the local rib-cage curvature and the change in the lung volume. Results also show good sensor accuracy in measurements of tidal and minute respiratory volumes for all clinically relevant breathing volumes [2]. Additionally, we examine the possibility of using the rib-cage movement signal measured by a single LPG sensor as a new way to provide a trigger to the ventilator. Our preliminary results on healthy volunteers provide the statistical evidence of the 200 ms lag of the pneumotechometer with respect to the fibre-optic signal. The proposed single-sensor method is non-invasive, simple, low-cost and easy to implement. Moreover this method does not suffer from the flaws of air-flow measurements, it eliminates the need for chest movement observation by clinicians and can be implemented on both male and female patients. The preliminary results are promising and indicate that the method proposed here could be used in NIV.",
publisher = "Belgrade : Vinča Institute of Nuclear Sciences",
journal = "PHOTONICA2015 : 5th International School and Conference on Photonics and COST actions: MP1204, BM1205 and MP1205 : book of abstracts; August 24-28, 2015; Belgrade",
title = "A long-period fibre grating sensor for respiratory monitoring",
pages = "168-168",
url = "https://hdl.handle.net/21.15107/rcub_vinar_12011"
}

Ivanović, M. D., Petrović, J., Daničić, A., Miletić, M., Vukčević, M., Bojović, B., Hadžievski, L., Allsop, T.,& Webb, D. J.. (2015). A long-period fibre grating sensor for respiratory monitoring. in PHOTONICA2015 : 5th International School and Conference on Photonics and COST actions: MP1204, BM1205 and MP1205 : book of abstracts; August 24-28, 2015; Belgrade
Belgrade : Vinča Institute of Nuclear Sciences., 168-168.
https://hdl.handle.net/21.15107/rcub_vinar_12011

Ivanović MD, Petrović J, Daničić A, Miletić M, Vukčević M, Bojović B, Hadžievski L, Allsop T, Webb DJ. A long-period fibre grating sensor for respiratory monitoring. in PHOTONICA2015 : 5th International School and Conference on Photonics and COST actions: MP1204, BM1205 and MP1205 : book of abstracts; August 24-28, 2015; Belgrade. 2015;:168-168.
https://hdl.handle.net/21.15107/rcub_vinar_12011 .

Ivanović, M. D., Petrović, Jovana, Daničić, Aleksandar, Miletić, Marjan, Vukčević, Miodrag, Bojović, Boško, Hadžievski, Ljupčo, Allsop, Thomas, Webb, D. J., "A long-period fibre grating sensor for respiratory monitoring" in PHOTONICA2015 : 5th International School and Conference on Photonics and COST actions: MP1204, BM1205 and MP1205 : book of abstracts; August 24-28, 2015; Belgrade (2015):168-168,
https://hdl.handle.net/21.15107/rcub_vinar_12011 .

TY  - JOUR
AU  - Petrovic, M. D.
AU  - Petrović, Jovana S.
AU  - Daničić, Aleksandar
AU  - Vukcevic, M.
AU  - Bojović, Boško
AU  - Hadžievski, Ljupčo
AU  - Allsop, Thomas P.
AU  - Lloyd, G.
AU  - Webb, David J.
PY  - 2014
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/5946
AB  - In non-invasive ventilation, continuous monitoring of respiratory volumes is essential. Here, we present a method for the measurement of respiratory volumes by a single fiber-grating sensor of bending and provide the proof-of-principle by applying a calibration-test measurement procedure on a set of 18 healthy volunteers. Results establish a linear correlation between a change in lung volume and the corresponding change in a local thorax curvature. They also show good sensor accuracy in measurements of tidal and minute respiratory volumes for different types of breathing. The proposed technique does not rely on the air flow through an oronasal mask or the observation of chest movement by a clinician, which distinguishes it from the current clinical practice. (C) 2014 Optical Society of America
T2  - Biomedical Optics Express
T1  - Non-invasive respiratory monitoring using long-period fiber grating sensors
VL  - 5
IS  - 4
SP  - 1136
EP  - 1144
DO  - 10.1364/BOE.5.001136
ER  - 

@article{
author = "Petrovic, M. D. and Petrović, Jovana S. and Daničić, Aleksandar and Vukcevic, M. and Bojović, Boško and Hadžievski, Ljupčo and Allsop, Thomas P. and Lloyd, G. and Webb, David J.",
year = "2014",
abstract = "In non-invasive ventilation, continuous monitoring of respiratory volumes is essential. Here, we present a method for the measurement of respiratory volumes by a single fiber-grating sensor of bending and provide the proof-of-principle by applying a calibration-test measurement procedure on a set of 18 healthy volunteers. Results establish a linear correlation between a change in lung volume and the corresponding change in a local thorax curvature. They also show good sensor accuracy in measurements of tidal and minute respiratory volumes for different types of breathing. The proposed technique does not rely on the air flow through an oronasal mask or the observation of chest movement by a clinician, which distinguishes it from the current clinical practice. (C) 2014 Optical Society of America",
journal = "Biomedical Optics Express",
title = "Non-invasive respiratory monitoring using long-period fiber grating sensors",
volume = "5",
number = "4",
pages = "1136-1144",
doi = "10.1364/BOE.5.001136"
}

Petrovic, M. D., Petrović, J. S., Daničić, A., Vukcevic, M., Bojović, B., Hadžievski, L., Allsop, T. P., Lloyd, G.,& Webb, D. J.. (2014). Non-invasive respiratory monitoring using long-period fiber grating sensors. in Biomedical Optics Express, 5(4), 1136-1144.
https://doi.org/10.1364/BOE.5.001136

Petrovic MD, Petrović JS, Daničić A, Vukcevic M, Bojović B, Hadžievski L, Allsop TP, Lloyd G, Webb DJ. Non-invasive respiratory monitoring using long-period fiber grating sensors. in Biomedical Optics Express. 2014;5(4):1136-1144.
doi:10.1364/BOE.5.001136 .

Petrovic, M. D., Petrović, Jovana S., Daničić, Aleksandar, Vukcevic, M., Bojović, Boško, Hadžievski, Ljupčo, Allsop, Thomas P., Lloyd, G., Webb, David J., "Non-invasive respiratory monitoring using long-period fiber grating sensors" in Biomedical Optics Express, 5, no. 4 (2014):1136-1144,
https://doi.org/10.1364/BOE.5.001136 . .

TY  - JOUR
AU  - Petrović, Marija D.
AU  - Daničić, Aleksandar
AU  - Atanasoski, Vladimir
AU  - Radosavljevic, S.
AU  - Prodanovic, V.
AU  - Miljković, Nadica
AU  - Petrović, Jovana S.
AU  - Petrovic, D.
AU  - Bojović, Boško
AU  - Hadžievski, Ljupčo
AU  - Allsop, Thomas P.
AU  - Lloyd, G.
AU  - Webb, David J.
PY  - 2013
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/7019
AB  - Mechanical physiological pulsations are movements of a body surface incited by the movements of muscles in organs inside the body. Here we demonstrate the use of long-period grating sensors in the detection of cardio-vascular pulsations (CVP), in particular apex and carotid pulsations. To calibrate the sensors, we use a mechanical tool designed specifically to measure the sensor response to a localized perturbation at different grating curvatures as working points. From the data we infer the amplitude of the CVP. Together with the electrophysiological signals, the CVP signals obtained from the sensors can provide significant information on heart function which is inaccessible to the electrocardiogram. The low cost and easy handling of the fibre sensors increase their prospects to become the sensors of choice for novel diagnostic devices.
T2  - Physica Scripta
T1  - Fibre-grating sensors for the measurement of physiological pulsations
VL  - T157
SP  - 014022
DO  - 10.1088/0031-8949/2013/T157/014022
ER  - 

@article{
author = "Petrović, Marija D. and Daničić, Aleksandar and Atanasoski, Vladimir and Radosavljevic, S. and Prodanovic, V. and Miljković, Nadica and Petrović, Jovana S. and Petrovic, D. and Bojović, Boško and Hadžievski, Ljupčo and Allsop, Thomas P. and Lloyd, G. and Webb, David J.",
year = "2013",
abstract = "Mechanical physiological pulsations are movements of a body surface incited by the movements of muscles in organs inside the body. Here we demonstrate the use of long-period grating sensors in the detection of cardio-vascular pulsations (CVP), in particular apex and carotid pulsations. To calibrate the sensors, we use a mechanical tool designed specifically to measure the sensor response to a localized perturbation at different grating curvatures as working points. From the data we infer the amplitude of the CVP. Together with the electrophysiological signals, the CVP signals obtained from the sensors can provide significant information on heart function which is inaccessible to the electrocardiogram. The low cost and easy handling of the fibre sensors increase their prospects to become the sensors of choice for novel diagnostic devices.",
journal = "Physica Scripta",
title = "Fibre-grating sensors for the measurement of physiological pulsations",
volume = "T157",
pages = "014022",
doi = "10.1088/0031-8949/2013/T157/014022"
}

Petrović, M. D., Daničić, A., Atanasoski, V., Radosavljevic, S., Prodanovic, V., Miljković, N., Petrović, J. S., Petrovic, D., Bojović, B., Hadžievski, L., Allsop, T. P., Lloyd, G.,& Webb, D. J.. (2013). Fibre-grating sensors for the measurement of physiological pulsations. in Physica Scripta, T157, 014022.
https://doi.org/10.1088/0031-8949/2013/T157/014022

Petrović MD, Daničić A, Atanasoski V, Radosavljevic S, Prodanovic V, Miljković N, Petrović JS, Petrovic D, Bojović B, Hadžievski L, Allsop TP, Lloyd G, Webb DJ. Fibre-grating sensors for the measurement of physiological pulsations. in Physica Scripta. 2013;T157:014022.
doi:10.1088/0031-8949/2013/T157/014022 .

Petrović, Marija D., Daničić, Aleksandar, Atanasoski, Vladimir, Radosavljevic, S., Prodanovic, V., Miljković, Nadica, Petrović, Jovana S., Petrovic, D., Bojović, Boško, Hadžievski, Ljupčo, Allsop, Thomas P., Lloyd, G., Webb, David J., "Fibre-grating sensors for the measurement of physiological pulsations" in Physica Scripta, T157 (2013):014022,
https://doi.org/10.1088/0031-8949/2013/T157/014022 . .

TY  - CONF
AU  - Petrovic, Marija
AU  - Petrović, Jovana S.
AU  - Simic, Goran
AU  - Ilic, Igor
AU  - Daničić, Aleksandar
AU  - Vukcevic, Miodrag
AU  - Bojović, Boško
AU  - Hadžievski, Ljupčo
AU  - Allsop, Thomas P.
AU  - Webb, David J.
PY  - 2013
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/7036
AB  - Respiratory-volume monitoring is an indispensable part of mechanical ventilation. Here we present a new method of the respiratory-volume measurement based on a single fibre-optical long-period sensor of bending and the correlation between torso curvature and lung volume. Unlike the commonly used air-flow based measurement methods the proposed sensor is drift-free and immune to air-leaks. In the paper, we explain the working principle of sensors, a two-step calibration-test measurement procedure and present results that establish a linear correlation between the change in the local thorax curvature and the change of the lung volume. We also discuss the advantages and limitations of these sensors with respect to the current standards.
T1  - A New Method for Respiratory-Volume Monitoring Based on Long-Period Fibre Gratings
SP  - 2660
EP  - 2663
UR  - https://hdl.handle.net/21.15107/rcub_vinar_7036
ER  - 

@conference{
author = "Petrovic, Marija and Petrović, Jovana S. and Simic, Goran and Ilic, Igor and Daničić, Aleksandar and Vukcevic, Miodrag and Bojović, Boško and Hadžievski, Ljupčo and Allsop, Thomas P. and Webb, David J.",
year = "2013",
abstract = "Respiratory-volume monitoring is an indispensable part of mechanical ventilation. Here we present a new method of the respiratory-volume measurement based on a single fibre-optical long-period sensor of bending and the correlation between torso curvature and lung volume. Unlike the commonly used air-flow based measurement methods the proposed sensor is drift-free and immune to air-leaks. In the paper, we explain the working principle of sensors, a two-step calibration-test measurement procedure and present results that establish a linear correlation between the change in the local thorax curvature and the change of the lung volume. We also discuss the advantages and limitations of these sensors with respect to the current standards.",
title = "A New Method for Respiratory-Volume Monitoring Based on Long-Period Fibre Gratings",
pages = "2660-2663",
url = "https://hdl.handle.net/21.15107/rcub_vinar_7036"
}

Petrovic, M., Petrović, J. S., Simic, G., Ilic, I., Daničić, A., Vukcevic, M., Bojović, B., Hadžievski, L., Allsop, T. P.,& Webb, D. J.. (2013). A New Method for Respiratory-Volume Monitoring Based on Long-Period Fibre Gratings. , 2660-2663.
https://hdl.handle.net/21.15107/rcub_vinar_7036

Petrovic M, Petrović JS, Simic G, Ilic I, Daničić A, Vukcevic M, Bojović B, Hadžievski L, Allsop TP, Webb DJ. A New Method for Respiratory-Volume Monitoring Based on Long-Period Fibre Gratings. 2013;:2660-2663.
https://hdl.handle.net/21.15107/rcub_vinar_7036 .

Petrovic, Marija, Petrović, Jovana S., Simic, Goran, Ilic, Igor, Daničić, Aleksandar, Vukcevic, Miodrag, Bojović, Boško, Hadžievski, Ljupčo, Allsop, Thomas P., Webb, David J., "A New Method for Respiratory-Volume Monitoring Based on Long-Period Fibre Gratings" (2013):2660-2663,
https://hdl.handle.net/21.15107/rcub_vinar_7036 .

TY  - CONF
AU  - Vukcevic, Miodrag
AU  - Bojović, Boško
AU  - Petrović, Marija
AU  - Simic, Goran
AU  - Daničić, Aleksandar
AU  - Petrović, Jovana S.
AU  - Hadžievski, Ljupčo
PY  - 2013
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/2740
C3  - European Respiratory Journal
T1  - An early non-invasive detection of the patient inspiratory effort for patient-ventilator synchronization
VL  - 42
UR  - https://hdl.handle.net/21.15107/rcub_vinar_2740
ER  - 

@conference{
author = "Vukcevic, Miodrag and Bojović, Boško and Petrović, Marija and Simic, Goran and Daničić, Aleksandar and Petrović, Jovana S. and Hadžievski, Ljupčo",
year = "2013",
journal = "European Respiratory Journal",
title = "An early non-invasive detection of the patient inspiratory effort for patient-ventilator synchronization",
volume = "42",
url = "https://hdl.handle.net/21.15107/rcub_vinar_2740"
}

Vukcevic, M., Bojović, B., Petrović, M., Simic, G., Daničić, A., Petrović, J. S.,& Hadžievski, L.. (2013). An early non-invasive detection of the patient inspiratory effort for patient-ventilator synchronization. in European Respiratory Journal, 42.
https://hdl.handle.net/21.15107/rcub_vinar_2740

Vukcevic M, Bojović B, Petrović M, Simic G, Daničić A, Petrović JS, Hadžievski L. An early non-invasive detection of the patient inspiratory effort for patient-ventilator synchronization. in European Respiratory Journal. 2013;42.
https://hdl.handle.net/21.15107/rcub_vinar_2740 .

Vukcevic, Miodrag, Bojović, Boško, Petrović, Marija, Simic, Goran, Daničić, Aleksandar, Petrović, Jovana S., Hadžievski, Ljupčo, "An early non-invasive detection of the patient inspiratory effort for patient-ventilator synchronization" in European Respiratory Journal, 42 (2013),
https://hdl.handle.net/21.15107/rcub_vinar_2740 .

TY  - CONF
AU  - Vukcevic, Miodrag
AU  - Bojović, Boško
AU  - Petrović, Marija
AU  - Petrović, Jovana S.
AU  - Daničić, Aleksandar
AU  - Simic, Goran
AU  - Hadžievski, Ljupčo
PY  - 2013
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/2741
C3  - European Respiratory Journal
T1  - A non-invasive LPG (long-period grating) fiber-optic sensing method for respiratory volume monitoring
VL  - 42
UR  - https://hdl.handle.net/21.15107/rcub_vinar_2741
ER  - 

@conference{
author = "Vukcevic, Miodrag and Bojović, Boško and Petrović, Marija and Petrović, Jovana S. and Daničić, Aleksandar and Simic, Goran and Hadžievski, Ljupčo",
year = "2013",
journal = "European Respiratory Journal",
title = "A non-invasive LPG (long-period grating) fiber-optic sensing method for respiratory volume monitoring",
volume = "42",
url = "https://hdl.handle.net/21.15107/rcub_vinar_2741"
}

Vukcevic, M., Bojović, B., Petrović, M., Petrović, J. S., Daničić, A., Simic, G.,& Hadžievski, L.. (2013). A non-invasive LPG (long-period grating) fiber-optic sensing method for respiratory volume monitoring. in European Respiratory Journal, 42.
https://hdl.handle.net/21.15107/rcub_vinar_2741

Vukcevic M, Bojović B, Petrović M, Petrović JS, Daničić A, Simic G, Hadžievski L. A non-invasive LPG (long-period grating) fiber-optic sensing method for respiratory volume monitoring. in European Respiratory Journal. 2013;42.
https://hdl.handle.net/21.15107/rcub_vinar_2741 .

Vukcevic, Miodrag, Bojović, Boško, Petrović, Marija, Petrović, Jovana S., Daničić, Aleksandar, Simic, Goran, Hadžievski, Ljupčo, "A non-invasive LPG (long-period grating) fiber-optic sensing method for respiratory volume monitoring" in European Respiratory Journal, 42 (2013),
https://hdl.handle.net/21.15107/rcub_vinar_2741 .

TY  - JOUR
AU  - Gussak, Ihor
AU  - Vukajlovic, Dejan
AU  - Vukcevic, Vladan
AU  - George, Samuel
AU  - Bojović, Boško
AU  - Hadžievski, Ljupčo
AU  - Simic, Goran
AU  - Stojanovic, Bojan
AU  - Angelkov, Lazar
AU  - Panescu, Dorin
PY  - 2012
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/4713
AB  - Objective: Atrial fibrillation (AF) surveillance using a wireless handheld monitor capable of 12-lead electrocardiogram reconstruction was performed, and arrhythmia detection rate was compared with serial Holter monitoring. Methods: Twenty-five patients were monitored after an AF ablation procedure using the hand-held monitor for 2 months immediately after and then for 1 month approximately 6 months postablation. All patients underwent 12-lead 24-hour Holter monitoring at 1, 2, and 6 months postablation. Results: During months 1-2, 425 of 2942 hand-held monitor transmissions from 21 of 25 patients showed AF/atrial flutter (Afl). The frequency of detected arrhythmias decreased by month 6 to 85/1128 (P LT .01) in 15 of 23 patients. Hotter monitoring diagnosed AF/Afl in 8 of 25 and 7 of 23 patients at months 1-2 and month 6, respectively (P LT .01 compared with wireless hand-held monitor). Af/Afl diagnosis by wireless monitoring preceded Holler detection by an average of 24 days. Conclusions: Wireless monitoring with 12-lead electrocardiogram reconstruction demonstrated reliable AF/Afl detection that was more sensitive than serial 12-lead 24-hour Holter monitoring. (C) 2012 Elsevier Inc. All rights reserved.
T2  - Journal of Electrocardiology
T1  - Wireless remote monitoring of reconstructed 12-lead ECGs after ablation for atrial fibrillation using a hand-held device
VL  - 45
IS  - 2
SP  - 129
EP  - 135
DO  - 10.1016/j.jelectrocard.2011.09.003
ER  - 

@article{
author = "Gussak, Ihor and Vukajlovic, Dejan and Vukcevic, Vladan and George, Samuel and Bojović, Boško and Hadžievski, Ljupčo and Simic, Goran and Stojanovic, Bojan and Angelkov, Lazar and Panescu, Dorin",
year = "2012",
abstract = "Objective: Atrial fibrillation (AF) surveillance using a wireless handheld monitor capable of 12-lead electrocardiogram reconstruction was performed, and arrhythmia detection rate was compared with serial Holter monitoring. Methods: Twenty-five patients were monitored after an AF ablation procedure using the hand-held monitor for 2 months immediately after and then for 1 month approximately 6 months postablation. All patients underwent 12-lead 24-hour Holter monitoring at 1, 2, and 6 months postablation. Results: During months 1-2, 425 of 2942 hand-held monitor transmissions from 21 of 25 patients showed AF/atrial flutter (Afl). The frequency of detected arrhythmias decreased by month 6 to 85/1128 (P LT .01) in 15 of 23 patients. Hotter monitoring diagnosed AF/Afl in 8 of 25 and 7 of 23 patients at months 1-2 and month 6, respectively (P LT .01 compared with wireless hand-held monitor). Af/Afl diagnosis by wireless monitoring preceded Holler detection by an average of 24 days. Conclusions: Wireless monitoring with 12-lead electrocardiogram reconstruction demonstrated reliable AF/Afl detection that was more sensitive than serial 12-lead 24-hour Holter monitoring. (C) 2012 Elsevier Inc. All rights reserved.",
journal = "Journal of Electrocardiology",
title = "Wireless remote monitoring of reconstructed 12-lead ECGs after ablation for atrial fibrillation using a hand-held device",
volume = "45",
number = "2",
pages = "129-135",
doi = "10.1016/j.jelectrocard.2011.09.003"
}

Gussak, I., Vukajlovic, D., Vukcevic, V., George, S., Bojović, B., Hadžievski, L., Simic, G., Stojanovic, B., Angelkov, L.,& Panescu, D.. (2012). Wireless remote monitoring of reconstructed 12-lead ECGs after ablation for atrial fibrillation using a hand-held device. in Journal of Electrocardiology, 45(2), 129-135.
https://doi.org/10.1016/j.jelectrocard.2011.09.003

Gussak I, Vukajlovic D, Vukcevic V, George S, Bojović B, Hadžievski L, Simic G, Stojanovic B, Angelkov L, Panescu D. Wireless remote monitoring of reconstructed 12-lead ECGs after ablation for atrial fibrillation using a hand-held device. in Journal of Electrocardiology. 2012;45(2):129-135.
doi:10.1016/j.jelectrocard.2011.09.003 .

Gussak, Ihor, Vukajlovic, Dejan, Vukcevic, Vladan, George, Samuel, Bojović, Boško, Hadžievski, Ljupčo, Simic, Goran, Stojanovic, Bojan, Angelkov, Lazar, Panescu, Dorin, "Wireless remote monitoring of reconstructed 12-lead ECGs after ablation for atrial fibrillation using a hand-held device" in Journal of Electrocardiology, 45, no. 2 (2012):129-135,
https://doi.org/10.1016/j.jelectrocard.2011.09.003 . .

TY  - JOUR
AU  - Telečki, Igor N.
AU  - Petrović, Srđan M.
AU  - Beličev, Petar
AU  - Radenovic, B.
AU  - Balvanović, Roman V.
AU  - Bojović, Boško
AU  - Nešković, Nebojša B.
PY  - 2012
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/5158
AB  - This paper is devoted to the focusing properties of a square electrostatic rainbow lens, which is a novel ion beam optical element. We consider the transmission of parallel and non-parallel proton beams of the initial kinetic energy of 10 keV through this lens. The potential of the electrodes of the lens is chosen to be 2 kV. The electrostatic potential and components of the electric field in the region of the lens are calculated using a three-dimensional finite element computer code. We investigate the spatial and angular distributions of protons propagating through the lens and in the drift space after it. It is confirmed that the evolutions of these distributions are determined by the evolutions of the corresponding rainbow lines, generated using the theory of crystal rainbows. The beam is separated into two components. One beam component, appearing as a beam core, is generated dominantly by the focused protons. Its boundary line in the transverse position plane can be very well approximated by a hypotrochoid. The other beam component is generated dominantly by the defocused protons. We present the focusing coefficient of the lens, the confining coefficients of the lens for the focused and defocused protons, the density of the beam core, the vertical or horizontal emittance of the beam core, and the brightness of the beam core. (C) 2012 Elsevier B.V. All rights reserved.
T2  - Nuclear Instruments and Methods in Physics Research. Section A: Accelerators, Spectrometers, Detectors, and Associated Equipment
T1  - Focusing properties of a square electrostatic rainbow lens
VL  - 694
SP  - 224
EP  - 233
DO  - 10.1016/j.nima.2012.08.051
ER  - 

@article{
author = "Telečki, Igor N. and Petrović, Srđan M. and Beličev, Petar and Radenovic, B. and Balvanović, Roman V. and Bojović, Boško and Nešković, Nebojša B.",
year = "2012",
abstract = "This paper is devoted to the focusing properties of a square electrostatic rainbow lens, which is a novel ion beam optical element. We consider the transmission of parallel and non-parallel proton beams of the initial kinetic energy of 10 keV through this lens. The potential of the electrodes of the lens is chosen to be 2 kV. The electrostatic potential and components of the electric field in the region of the lens are calculated using a three-dimensional finite element computer code. We investigate the spatial and angular distributions of protons propagating through the lens and in the drift space after it. It is confirmed that the evolutions of these distributions are determined by the evolutions of the corresponding rainbow lines, generated using the theory of crystal rainbows. The beam is separated into two components. One beam component, appearing as a beam core, is generated dominantly by the focused protons. Its boundary line in the transverse position plane can be very well approximated by a hypotrochoid. The other beam component is generated dominantly by the defocused protons. We present the focusing coefficient of the lens, the confining coefficients of the lens for the focused and defocused protons, the density of the beam core, the vertical or horizontal emittance of the beam core, and the brightness of the beam core. (C) 2012 Elsevier B.V. All rights reserved.",
journal = "Nuclear Instruments and Methods in Physics Research. Section A: Accelerators, Spectrometers, Detectors, and Associated Equipment",
title = "Focusing properties of a square electrostatic rainbow lens",
volume = "694",
pages = "224-233",
doi = "10.1016/j.nima.2012.08.051"
}

Telečki, I. N., Petrović, S. M., Beličev, P., Radenovic, B., Balvanović, R. V., Bojović, B.,& Nešković, N. B.. (2012). Focusing properties of a square electrostatic rainbow lens. in Nuclear Instruments and Methods in Physics Research. Section A: Accelerators, Spectrometers, Detectors, and Associated Equipment, 694, 224-233.
https://doi.org/10.1016/j.nima.2012.08.051

Telečki IN, Petrović SM, Beličev P, Radenovic B, Balvanović RV, Bojović B, Nešković NB. Focusing properties of a square electrostatic rainbow lens. in Nuclear Instruments and Methods in Physics Research. Section A: Accelerators, Spectrometers, Detectors, and Associated Equipment. 2012;694:224-233.
doi:10.1016/j.nima.2012.08.051 .

Telečki, Igor N., Petrović, Srđan M., Beličev, Petar, Radenovic, B., Balvanović, Roman V., Bojović, Boško, Nešković, Nebojša B., "Focusing properties of a square electrostatic rainbow lens" in Nuclear Instruments and Methods in Physics Research. Section A: Accelerators, Spectrometers, Detectors, and Associated Equipment, 694 (2012):224-233,
https://doi.org/10.1016/j.nima.2012.08.051 . .

TY  - JOUR
AU  - Trajić, Ivan
AU  - Beličev, Petar
AU  - Petrović, Srđan M.
AU  - Rajčević, Milan N.
AU  - Munitlak, Dragan M.
AU  - Bojović, Boško
PY  - 2012
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/5268
AB  - A method of measuring particle fluence and ion beam current in experiments of ion implantation is presented. The design and technical details of a realized prototype device are discussed. Special care is devoted to the effect of secondary electrons and its elimination. An electrostatic solution with two electrodes for the suppression of secondary electrons has been realized. Our approach provides redundancy and allows lower bias voltages to be used for the suppression of electrons. The presented results illustrate the efficiency of the proposed solution.
T2  - Nuclear technology and radiation protection
T1  - Prototype of the Particle Fluence Measurement Device
VL  - 27
IS  - 4
SP  - 404
EP  - 408
DO  - 10.2298/NTRP1204404T
ER  - 

@article{
author = "Trajić, Ivan and Beličev, Petar and Petrović, Srđan M. and Rajčević, Milan N. and Munitlak, Dragan M. and Bojović, Boško",
year = "2012",
abstract = "A method of measuring particle fluence and ion beam current in experiments of ion implantation is presented. The design and technical details of a realized prototype device are discussed. Special care is devoted to the effect of secondary electrons and its elimination. An electrostatic solution with two electrodes for the suppression of secondary electrons has been realized. Our approach provides redundancy and allows lower bias voltages to be used for the suppression of electrons. The presented results illustrate the efficiency of the proposed solution.",
journal = "Nuclear technology and radiation protection",
title = "Prototype of the Particle Fluence Measurement Device",
volume = "27",
number = "4",
pages = "404-408",
doi = "10.2298/NTRP1204404T"
}

Trajić, I., Beličev, P., Petrović, S. M., Rajčević, M. N., Munitlak, D. M.,& Bojović, B.. (2012). Prototype of the Particle Fluence Measurement Device. in Nuclear technology and radiation protection, 27(4), 404-408.
https://doi.org/10.2298/NTRP1204404T

Trajić I, Beličev P, Petrović SM, Rajčević MN, Munitlak DM, Bojović B. Prototype of the Particle Fluence Measurement Device. in Nuclear technology and radiation protection. 2012;27(4):404-408.
doi:10.2298/NTRP1204404T .

Trajić, Ivan, Beličev, Petar, Petrović, Srđan M., Rajčević, Milan N., Munitlak, Dragan M., Bojović, Boško, "Prototype of the Particle Fluence Measurement Device" in Nuclear technology and radiation protection, 27, no. 4 (2012):404-408,
https://doi.org/10.2298/NTRP1204404T . .

TY  - JOUR
AU  - Nešković, Nebojša B.
AU  - Telečki, Igor N.
AU  - Bojović, Boško
AU  - Petrović, Srđan M.
PY  - 2011
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/4269
AB  - The subject of this paper is the transmission of protons through a square electrostatic rainbow lens, which is similar to a quadrupole electrostatic lens and analogous to a crystal channel. The potential of the electrodes is chosen to be 10, 20, 50 and 100 kV. The initial proton kinetic energy is 10 keV. It is shown that the interaction potential between the proton and lens is purely anharmonic. We explore the spatial distributions of transmitted protons inside the lens and in the drift space after its exit. It is demonstrated that the evolution of the spatial distribution is determined by the evolution of the corresponding rainbow pattern. The proton beam after passing through the lens is clearly separated into the bright and dark components, which correspond to the bright and dark sides of the rainbow, respectively. All the focused protons are confined within the rainbow line. This effect is called the catastrophic ion beam focusing. We also explore the angular distributions of transmitted protons at the lens exit. The corresponding rainbow patterns appear only when the potential is 50 and 100 kV. In these cases almost all the focused protons are confined within the rainbow line. This means that the lens enables one to create a proton beam core, which includes the protons focused in both the transverse position plane and the transmission angle plane. The evolutions of the focused and defocused groups of protons are analyzed quantitatively via three parameters - the focusing coefficient of the lens, and the confining coefficients of the lens for the focused and defocused protons. Finally, we discuss the possible applications of the lens.
T2  - Nuclear Instruments and Methods in Physics Research. Section A: Accelerators, Spectrometers, Detectors, and Associated Equipment
T1  - A square electrostatic rainbow lens: Catastrophic ion beam focusing
VL  - 635
IS  - 1
SP  - 1
EP  - 7
DO  - 10.1016/j.nima.2010.12.126
ER  - 

@article{
author = "Nešković, Nebojša B. and Telečki, Igor N. and Bojović, Boško and Petrović, Srđan M.",
year = "2011",
abstract = "The subject of this paper is the transmission of protons through a square electrostatic rainbow lens, which is similar to a quadrupole electrostatic lens and analogous to a crystal channel. The potential of the electrodes is chosen to be 10, 20, 50 and 100 kV. The initial proton kinetic energy is 10 keV. It is shown that the interaction potential between the proton and lens is purely anharmonic. We explore the spatial distributions of transmitted protons inside the lens and in the drift space after its exit. It is demonstrated that the evolution of the spatial distribution is determined by the evolution of the corresponding rainbow pattern. The proton beam after passing through the lens is clearly separated into the bright and dark components, which correspond to the bright and dark sides of the rainbow, respectively. All the focused protons are confined within the rainbow line. This effect is called the catastrophic ion beam focusing. We also explore the angular distributions of transmitted protons at the lens exit. The corresponding rainbow patterns appear only when the potential is 50 and 100 kV. In these cases almost all the focused protons are confined within the rainbow line. This means that the lens enables one to create a proton beam core, which includes the protons focused in both the transverse position plane and the transmission angle plane. The evolutions of the focused and defocused groups of protons are analyzed quantitatively via three parameters - the focusing coefficient of the lens, and the confining coefficients of the lens for the focused and defocused protons. Finally, we discuss the possible applications of the lens.",
journal = "Nuclear Instruments and Methods in Physics Research. Section A: Accelerators, Spectrometers, Detectors, and Associated Equipment",
title = "A square electrostatic rainbow lens: Catastrophic ion beam focusing",
volume = "635",
number = "1",
pages = "1-7",
doi = "10.1016/j.nima.2010.12.126"
}

Nešković, N. B., Telečki, I. N., Bojović, B.,& Petrović, S. M.. (2011). A square electrostatic rainbow lens: Catastrophic ion beam focusing. in Nuclear Instruments and Methods in Physics Research. Section A: Accelerators, Spectrometers, Detectors, and Associated Equipment, 635(1), 1-7.
https://doi.org/10.1016/j.nima.2010.12.126

Nešković NB, Telečki IN, Bojović B, Petrović SM. A square electrostatic rainbow lens: Catastrophic ion beam focusing. in Nuclear Instruments and Methods in Physics Research. Section A: Accelerators, Spectrometers, Detectors, and Associated Equipment. 2011;635(1):1-7.
doi:10.1016/j.nima.2010.12.126 .

Nešković, Nebojša B., Telečki, Igor N., Bojović, Boško, Petrović, Srđan M., "A square electrostatic rainbow lens: Catastrophic ion beam focusing" in Nuclear Instruments and Methods in Physics Research. Section A: Accelerators, Spectrometers, Detectors, and Associated Equipment, 635, no. 1 (2011):1-7,
https://doi.org/10.1016/j.nima.2010.12.126 . .

TY  - CONF
AU  - Wenzel, Brian J.
AU  - George, Samuel
AU  - Lakkireddy, Dhanunjaya
AU  - Vanga, Subba
AU  - Bommana, Sudha
AU  - Gussak, Ihor
AU  - Simic, Goran
AU  - Bojović, Boško
AU  - Hadžievski, Ljupčo
AU  - Panescu, Dorin
PY  - 2011
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/6936
AB  - Acute myocardial infarction (AMI) diagnosis in type II diabetes (DM2) patients is difficult and ECG findings are often non-diagnostic or inconclusive. We developed computer algorithms to process standard 12-lead ECG input data for quantitative 3-dimensional (3D) analysis (my3KGTM), and hypothesized that use of the my3KGTMs array of over 100 3D-based AMI diagnostic markers may improve diagnostic accuracy for AMI in DM2 patients. Methods: We identified 155 consecutive DM2 patients age GT 25 yrs with chest discomfort or shortness of breath who were evaluated at an urban emergency department (130 patients (pts)) or the cardiac catheterization laboratory (25 pts) for possible AMI. The first digital 12-lead ECG for each patient, obtained within 30 min of presentation, was evaluated by (1) 2 blinded expert cardiologists, and (2) my3KGTM. In each case, the ECG was classified as either likely AMI or likely non-AMI. Gold standard was the final clinical diagnosis. Statistical analysis was McNemars test with continuity correction. Results: The 155 DM2 patients were 50% male, mean age 56.8 +/- 12.0 yrs; 44 pts had a final clinical diagnosis of AMI (17 ST Elevation Myocardial Infarctions (STEMI), 27 Non-ST Elevation Myocardial Infarctions (NSTEMI)) and 111 had no AMI. Conclusions: Relative to standard 12L ECG read by cardiologists, quantitative 3D ECG analysis showed significant and substantial gains in sensitivity for AMI diagnosis in DM2 patients, without loss in specificity. Sensitivity gains were particularly high in patients exhibiting NSTEMI, the most common form of AMI in DM2.
T1  - Algorithm for Quantitative 3 Dimensional Analysis of ECG Signals Improves Myocardial Diagnosis over Cardiologists in Diabetic Patients
SP  - 965
EP  - 968
UR  - https://hdl.handle.net/21.15107/rcub_vinar_6936
ER  - 

@conference{
author = "Wenzel, Brian J. and George, Samuel and Lakkireddy, Dhanunjaya and Vanga, Subba and Bommana, Sudha and Gussak, Ihor and Simic, Goran and Bojović, Boško and Hadžievski, Ljupčo and Panescu, Dorin",
year = "2011",
abstract = "Acute myocardial infarction (AMI) diagnosis in type II diabetes (DM2) patients is difficult and ECG findings are often non-diagnostic or inconclusive. We developed computer algorithms to process standard 12-lead ECG input data for quantitative 3-dimensional (3D) analysis (my3KGTM), and hypothesized that use of the my3KGTMs array of over 100 3D-based AMI diagnostic markers may improve diagnostic accuracy for AMI in DM2 patients. Methods: We identified 155 consecutive DM2 patients age GT 25 yrs with chest discomfort or shortness of breath who were evaluated at an urban emergency department (130 patients (pts)) or the cardiac catheterization laboratory (25 pts) for possible AMI. The first digital 12-lead ECG for each patient, obtained within 30 min of presentation, was evaluated by (1) 2 blinded expert cardiologists, and (2) my3KGTM. In each case, the ECG was classified as either likely AMI or likely non-AMI. Gold standard was the final clinical diagnosis. Statistical analysis was McNemars test with continuity correction. Results: The 155 DM2 patients were 50% male, mean age 56.8 +/- 12.0 yrs; 44 pts had a final clinical diagnosis of AMI (17 ST Elevation Myocardial Infarctions (STEMI), 27 Non-ST Elevation Myocardial Infarctions (NSTEMI)) and 111 had no AMI. Conclusions: Relative to standard 12L ECG read by cardiologists, quantitative 3D ECG analysis showed significant and substantial gains in sensitivity for AMI diagnosis in DM2 patients, without loss in specificity. Sensitivity gains were particularly high in patients exhibiting NSTEMI, the most common form of AMI in DM2.",
title = "Algorithm for Quantitative 3 Dimensional Analysis of ECG Signals Improves Myocardial Diagnosis over Cardiologists in Diabetic Patients",
pages = "965-968",
url = "https://hdl.handle.net/21.15107/rcub_vinar_6936"
}

Wenzel, B. J., George, S., Lakkireddy, D., Vanga, S., Bommana, S., Gussak, I., Simic, G., Bojović, B., Hadžievski, L.,& Panescu, D.. (2011). Algorithm for Quantitative 3 Dimensional Analysis of ECG Signals Improves Myocardial Diagnosis over Cardiologists in Diabetic Patients. , 965-968.
https://hdl.handle.net/21.15107/rcub_vinar_6936

Wenzel BJ, George S, Lakkireddy D, Vanga S, Bommana S, Gussak I, Simic G, Bojović B, Hadžievski L, Panescu D. Algorithm for Quantitative 3 Dimensional Analysis of ECG Signals Improves Myocardial Diagnosis over Cardiologists in Diabetic Patients. 2011;:965-968.
https://hdl.handle.net/21.15107/rcub_vinar_6936 .

Wenzel, Brian J., George, Samuel, Lakkireddy, Dhanunjaya, Vanga, Subba, Bommana, Sudha, Gussak, Ihor, Simic, Goran, Bojović, Boško, Hadžievski, Ljupčo, Panescu, Dorin, "Algorithm for Quantitative 3 Dimensional Analysis of ECG Signals Improves Myocardial Diagnosis over Cardiologists in Diabetic Patients" (2011):965-968,
https://hdl.handle.net/21.15107/rcub_vinar_6936 .

TY  - CONF
AU  - Vukajlovic, Dejan
AU  - Gussak, Ihor
AU  - George, Samuel
AU  - Simic, Goran
AU  - Bojović, Boško
AU  - Hadžievski, Ljupčo
AU  - Stojanovic, Bojan
AU  - Angelkov, Lazar
AU  - Panescu, Dorin
PY  - 2011
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/6937
AB  - Differential diagnosis of symptomatic events in post-ablation atrial fibrillation (AF) patients (pts) is important; in particular, accurate, reliable detection of AF or atrial flutter (AFL) is essential. However, existing remote monitoring devices usually require attached leads and are not suitable for prolonged monitoring; moreover, most do not provide sufficient information to assess atrial activity, since they generally monitor only 1-3 ECG leads and rely on RR interval variability for AF diagnosis. A new hand-held, wireless, symptom-activated event monitor (CardioBip; CB) does not require attached leads and hence can be conveniently used for extended periods. Moreover, CB provides data that enables remote reconstruction of full 12-lead ECG data including atrial signal information. We hypothesized that these CB features would enable accurate remote differential diagnosis of symptomatic arrhythmias in post-ablation AF pts. Methods: 21 pts who underwent catheter ablation for AF were instructed to make a CB transmission (TX) whenever palpitations, lightheadedness, or similar symptoms occurred, and at multiple times daily when asymptomatic, during a 60 day post-ablation time period. CB transmissions (TXs) were analyzed blindly by 2 expert readers, with differences adjudicated by consensus. Results: 7 pts had no symptomatic episodes during the monitoring period. 14 of 21 pts had symptomatic events and made a total of 1699 TX, 164 of which were during symptoms. TX quality was acceptable for rhythm diagnosis and atrial activity in 96%. 118 TX from 10 symptomatic pts showed AF (96 TX from 10 pts) or AFL (22 TX from 3 pts), and 46 TX from 9 pts showed frequent PACs or PVCs. No other arrhythmias were detected. Five pts made symptomatic TX during AF/AFL and also during PACs/PVCs. Conclusions: Use of CB during symptomatic episodes enabled detection and differential diagnosis of symptomatic arrhythmias. The ability of CB to provide accurate reconstruction of 12 L ECGs including atrial activity, combined with its ease of use, makes it suitable for long-term surveillance for recurrent AF in post-ablation patients.
T1  - Wireless Monitoring of Reconstructed 12-Lead ECG in Atrial Fibrillation Patients Enables Differential Diagnosis of Recurrent Arrhythmias
SP  - 4741
EP  - 4744
UR  - https://hdl.handle.net/21.15107/rcub_vinar_6937
ER  - 

@conference{
author = "Vukajlovic, Dejan and Gussak, Ihor and George, Samuel and Simic, Goran and Bojović, Boško and Hadžievski, Ljupčo and Stojanovic, Bojan and Angelkov, Lazar and Panescu, Dorin",
year = "2011",
abstract = "Differential diagnosis of symptomatic events in post-ablation atrial fibrillation (AF) patients (pts) is important; in particular, accurate, reliable detection of AF or atrial flutter (AFL) is essential. However, existing remote monitoring devices usually require attached leads and are not suitable for prolonged monitoring; moreover, most do not provide sufficient information to assess atrial activity, since they generally monitor only 1-3 ECG leads and rely on RR interval variability for AF diagnosis. A new hand-held, wireless, symptom-activated event monitor (CardioBip; CB) does not require attached leads and hence can be conveniently used for extended periods. Moreover, CB provides data that enables remote reconstruction of full 12-lead ECG data including atrial signal information. We hypothesized that these CB features would enable accurate remote differential diagnosis of symptomatic arrhythmias in post-ablation AF pts. Methods: 21 pts who underwent catheter ablation for AF were instructed to make a CB transmission (TX) whenever palpitations, lightheadedness, or similar symptoms occurred, and at multiple times daily when asymptomatic, during a 60 day post-ablation time period. CB transmissions (TXs) were analyzed blindly by 2 expert readers, with differences adjudicated by consensus. Results: 7 pts had no symptomatic episodes during the monitoring period. 14 of 21 pts had symptomatic events and made a total of 1699 TX, 164 of which were during symptoms. TX quality was acceptable for rhythm diagnosis and atrial activity in 96%. 118 TX from 10 symptomatic pts showed AF (96 TX from 10 pts) or AFL (22 TX from 3 pts), and 46 TX from 9 pts showed frequent PACs or PVCs. No other arrhythmias were detected. Five pts made symptomatic TX during AF/AFL and also during PACs/PVCs. Conclusions: Use of CB during symptomatic episodes enabled detection and differential diagnosis of symptomatic arrhythmias. The ability of CB to provide accurate reconstruction of 12 L ECGs including atrial activity, combined with its ease of use, makes it suitable for long-term surveillance for recurrent AF in post-ablation patients.",
title = "Wireless Monitoring of Reconstructed 12-Lead ECG in Atrial Fibrillation Patients Enables Differential Diagnosis of Recurrent Arrhythmias",
pages = "4741-4744",
url = "https://hdl.handle.net/21.15107/rcub_vinar_6937"
}

Vukajlovic, D., Gussak, I., George, S., Simic, G., Bojović, B., Hadžievski, L., Stojanovic, B., Angelkov, L.,& Panescu, D.. (2011). Wireless Monitoring of Reconstructed 12-Lead ECG in Atrial Fibrillation Patients Enables Differential Diagnosis of Recurrent Arrhythmias. , 4741-4744.
https://hdl.handle.net/21.15107/rcub_vinar_6937

Vukajlovic D, Gussak I, George S, Simic G, Bojović B, Hadžievski L, Stojanovic B, Angelkov L, Panescu D. Wireless Monitoring of Reconstructed 12-Lead ECG in Atrial Fibrillation Patients Enables Differential Diagnosis of Recurrent Arrhythmias. 2011;:4741-4744.
https://hdl.handle.net/21.15107/rcub_vinar_6937 .

Vukajlovic, Dejan, Gussak, Ihor, George, Samuel, Simic, Goran, Bojović, Boško, Hadžievski, Ljupčo, Stojanovic, Bojan, Angelkov, Lazar, Panescu, Dorin, "Wireless Monitoring of Reconstructed 12-Lead ECG in Atrial Fibrillation Patients Enables Differential Diagnosis of Recurrent Arrhythmias" (2011):4741-4744,
https://hdl.handle.net/21.15107/rcub_vinar_6937 .

TY  - CONF
AU  - Vukajlovic, Dejan
AU  - Bojović, Boško
AU  - Hadžievski, Ljupčo
AU  - George, Samuel
AU  - Gussak, Ihor
AU  - Panescu, Dorin
PY  - 2010
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/6904
AB  - Remote surveillance is important for patients with atrial fibrillation (AF). Atrial signal recognition with conventional monitoring devices is difficult; remote AF detection is predominantly accomplished by R-R interval analysis. Twelve lead ECG (12L) displays atrial activity and remains the gold standard for AF diagnosis. CardioBip is a portable wireless patient-activated event monitor providing signal reconstruction of a 12L waveform (12CB) using 5 leads and patient-specific transformation matrices. We hypothesized that atrial signal analysis with 12CB can detect atrial activity and improve AF detection. METHODS: 18 patients with AF undergoing DC cardioversion (CV) were studied. Separate 12-lead P and QRS patient-specific transformation matrices were created at baseline AF. Multiple wireless 12CB transmissions were performed 3-7 days before and up to 2 weeks after CV. Rhythm was confirmed with 12-lead ECGs (12L). In SR the number of leads with visible P waves (atrial signal GT 0.05 mV), and P wave polarity were analyzed. In AF, the number of leads with AF signal were compared (fibrillatory [f] waves GT 0.025 mV). RESULTS: Fourteen of 18 patients successfully cardioverted to SR and 4 failed; thus, 14 SR and 22 AF transmissions were analyzed. SR P wave was visible on 141/168 leads on 12L and 137/168 on 12CB (126 true pos [TP] and 11 false pos [FP] relative to 12L; p=0.26). In 126 leads with P waves in both 12L and 12CB, the methods agreed on P wave polarity in 125. In AF, F waves were visible in 178/264 leads on 12L and 189/264 leads on 12CB (144 TP, 45 FP; p=0.27). All 5 AF relapses were successfully detected by 12CB based on atrial activity. CONCLUSION: 12CB is not inferior to 12L in detecting atrial signal in SR and AF, and shows excellent potential for remote wireless monitoring of AF patients.
T1  - Wireless Remote Monitoring of Atrial Fibrillation Using Reconstructed 12-Lead ECGs
SP  - 1113
EP  - 1118
DO  - 10.1109/IEMBS.2010.5627086
ER  - 

@conference{
author = "Vukajlovic, Dejan and Bojović, Boško and Hadžievski, Ljupčo and George, Samuel and Gussak, Ihor and Panescu, Dorin",
year = "2010",
abstract = "Remote surveillance is important for patients with atrial fibrillation (AF). Atrial signal recognition with conventional monitoring devices is difficult; remote AF detection is predominantly accomplished by R-R interval analysis. Twelve lead ECG (12L) displays atrial activity and remains the gold standard for AF diagnosis. CardioBip is a portable wireless patient-activated event monitor providing signal reconstruction of a 12L waveform (12CB) using 5 leads and patient-specific transformation matrices. We hypothesized that atrial signal analysis with 12CB can detect atrial activity and improve AF detection. METHODS: 18 patients with AF undergoing DC cardioversion (CV) were studied. Separate 12-lead P and QRS patient-specific transformation matrices were created at baseline AF. Multiple wireless 12CB transmissions were performed 3-7 days before and up to 2 weeks after CV. Rhythm was confirmed with 12-lead ECGs (12L). In SR the number of leads with visible P waves (atrial signal GT 0.05 mV), and P wave polarity were analyzed. In AF, the number of leads with AF signal were compared (fibrillatory [f] waves GT 0.025 mV). RESULTS: Fourteen of 18 patients successfully cardioverted to SR and 4 failed; thus, 14 SR and 22 AF transmissions were analyzed. SR P wave was visible on 141/168 leads on 12L and 137/168 on 12CB (126 true pos [TP] and 11 false pos [FP] relative to 12L; p=0.26). In 126 leads with P waves in both 12L and 12CB, the methods agreed on P wave polarity in 125. In AF, F waves were visible in 178/264 leads on 12L and 189/264 leads on 12CB (144 TP, 45 FP; p=0.27). All 5 AF relapses were successfully detected by 12CB based on atrial activity. CONCLUSION: 12CB is not inferior to 12L in detecting atrial signal in SR and AF, and shows excellent potential for remote wireless monitoring of AF patients.",
title = "Wireless Remote Monitoring of Atrial Fibrillation Using Reconstructed 12-Lead ECGs",
pages = "1113-1118",
doi = "10.1109/IEMBS.2010.5627086"
}

Vukajlovic, D., Bojović, B., Hadžievski, L., George, S., Gussak, I.,& Panescu, D.. (2010). Wireless Remote Monitoring of Atrial Fibrillation Using Reconstructed 12-Lead ECGs. , 1113-1118.
https://doi.org/10.1109/IEMBS.2010.5627086

Vukajlovic D, Bojović B, Hadžievski L, George S, Gussak I, Panescu D. Wireless Remote Monitoring of Atrial Fibrillation Using Reconstructed 12-Lead ECGs. 2010;:1113-1118.
doi:10.1109/IEMBS.2010.5627086 .

Vukajlovic, Dejan, Bojović, Boško, Hadžievski, Ljupčo, George, Samuel, Gussak, Ihor, Panescu, Dorin, "Wireless Remote Monitoring of Atrial Fibrillation Using Reconstructed 12-Lead ECGs" (2010):1113-1118,
https://doi.org/10.1109/IEMBS.2010.5627086 . .

TY  - JOUR
AU  - Hadžievski, Ljupčo
AU  - Bojović, Boško
AU  - Vukcevic, V
AU  - Beličev, Petra
AU  - Pavlović, S
AU  - Vasiljevic-Pokrajcic, Z
AU  - Stojić, M.
PY  - 2004
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/2833
AB  - The problem of synthesizing the standard 12-lead electrocardiogram (ECG) from the signals recorded using three special ECG leads is studied in detail. The implementation of that concept into the design of a new mobile ECG transtelephonic system is presented. The system has two separate units: a stationary diagnostic-calibration center and a mobile ECG device with integrated electrodes. The patient records by himself three special leads with the mobile ECG recorder and sends data via cellular phone to the personal computer in the diagnostic center where standard 12-lead ECG is numerically reconstructed on the base of the patient transformation matrix previously calculated into the calibration process. The experimental study shows high accuracy of the reconstructed ECG.
T2  - IEEE Transactions on Information Technology in Biomedicine
T1  - A novel mobile transtelephonic system with synthesized 12-lead ECG
VL  - 8
IS  - 4
SP  - 428
EP  - 438
DO  - 10.1109/TITB.2004.837869
ER  - 

@article{
author = "Hadžievski, Ljupčo and Bojović, Boško and Vukcevic, V and Beličev, Petra and Pavlović, S and Vasiljevic-Pokrajcic, Z and Stojić, M.",
year = "2004",
abstract = "The problem of synthesizing the standard 12-lead electrocardiogram (ECG) from the signals recorded using three special ECG leads is studied in detail. The implementation of that concept into the design of a new mobile ECG transtelephonic system is presented. The system has two separate units: a stationary diagnostic-calibration center and a mobile ECG device with integrated electrodes. The patient records by himself three special leads with the mobile ECG recorder and sends data via cellular phone to the personal computer in the diagnostic center where standard 12-lead ECG is numerically reconstructed on the base of the patient transformation matrix previously calculated into the calibration process. The experimental study shows high accuracy of the reconstructed ECG.",
journal = "IEEE Transactions on Information Technology in Biomedicine",
title = "A novel mobile transtelephonic system with synthesized 12-lead ECG",
volume = "8",
number = "4",
pages = "428-438",
doi = "10.1109/TITB.2004.837869"
}

Hadžievski, L., Bojović, B., Vukcevic, V., Beličev, P., Pavlović, S., Vasiljevic-Pokrajcic, Z.,& Stojić, M.. (2004). A novel mobile transtelephonic system with synthesized 12-lead ECG. in IEEE Transactions on Information Technology in Biomedicine, 8(4), 428-438.
https://doi.org/10.1109/TITB.2004.837869

Hadžievski L, Bojović B, Vukcevic V, Beličev P, Pavlović S, Vasiljevic-Pokrajcic Z, Stojić M. A novel mobile transtelephonic system with synthesized 12-lead ECG. in IEEE Transactions on Information Technology in Biomedicine. 2004;8(4):428-438.
doi:10.1109/TITB.2004.837869 .

Hadžievski, Ljupčo, Bojović, Boško, Vukcevic, V, Beličev, Petra, Pavlović, S, Vasiljevic-Pokrajcic, Z, Stojić, M., "A novel mobile transtelephonic system with synthesized 12-lead ECG" in IEEE Transactions on Information Technology in Biomedicine, 8, no. 4 (2004):428-438,
https://doi.org/10.1109/TITB.2004.837869 . .

TY  - JOUR
AU  - Nešković, Nebojša B.
AU  - Ristić-Đurović, Jasna L.
AU  - Vorojtsov, SB
AU  - Beličev, Petar
AU  - Ivanenko, IA
AU  - Cirkovic, S
AU  - Vorozhtsov, AS
AU  - Bojović, Boško
AU  - Dobrosavljević, Aleksandar S.
AU  - Vujović, Velibor V.
AU  - Čomor, Jožef J.
AU  - Pajović, Snežana B.
PY  - 2003
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/6381
AB  - The VINCY Cyclotron is the main part of the TESLA Accelerator Installation. The diameter of the pole of this machine is 2000 mm. Its bending constant is 145 MeV while its focusing constant is 75 MeV. The radiofrequency system of the machine consists of two lambda/4-resonators with the eigenfrequency in the range from 17 to 31 MHz. Ions coming from a heavy ion source or a light ion source will be injected into the machine axially. They will be introduced into its median plane by a spiral inflector. Heavy ions accelerated in the machine will be extracted from it by a foil stripping system or by an electrostatic deflection system. Light ions will be extracted from it by the foil stripping system. The first programs of use of the VINCY Cyclotron are related to routine and experimental production of radioisotopes and radiopharmaceuticals, and to biomedical research with ion beams. The first beam extracted from the machine will be the proton beam of the energy of 22 MeV obtained from the H-2(+) beam extracted from the light ion source. This beam will be used first for production of radioisotope F-18 and radiopharmaceutical (18)FDG, to be employed for positron emission tomography.
T2  - Nukleonika
T1  - Status report of the VINCY cyclotron
VL  - 48
SP  - S135
EP  - S139
UR  - https://hdl.handle.net/21.15107/rcub_vinar_6381
ER  - 

@article{
author = "Nešković, Nebojša B. and Ristić-Đurović, Jasna L. and Vorojtsov, SB and Beličev, Petar and Ivanenko, IA and Cirkovic, S and Vorozhtsov, AS and Bojović, Boško and Dobrosavljević, Aleksandar S. and Vujović, Velibor V. and Čomor, Jožef J. and Pajović, Snežana B.",
year = "2003",
abstract = "The VINCY Cyclotron is the main part of the TESLA Accelerator Installation. The diameter of the pole of this machine is 2000 mm. Its bending constant is 145 MeV while its focusing constant is 75 MeV. The radiofrequency system of the machine consists of two lambda/4-resonators with the eigenfrequency in the range from 17 to 31 MHz. Ions coming from a heavy ion source or a light ion source will be injected into the machine axially. They will be introduced into its median plane by a spiral inflector. Heavy ions accelerated in the machine will be extracted from it by a foil stripping system or by an electrostatic deflection system. Light ions will be extracted from it by the foil stripping system. The first programs of use of the VINCY Cyclotron are related to routine and experimental production of radioisotopes and radiopharmaceuticals, and to biomedical research with ion beams. The first beam extracted from the machine will be the proton beam of the energy of 22 MeV obtained from the H-2(+) beam extracted from the light ion source. This beam will be used first for production of radioisotope F-18 and radiopharmaceutical (18)FDG, to be employed for positron emission tomography.",
journal = "Nukleonika",
title = "Status report of the VINCY cyclotron",
volume = "48",
pages = "S135-S139",
url = "https://hdl.handle.net/21.15107/rcub_vinar_6381"
}

Nešković, N. B., Ristić-Đurović, J. L., Vorojtsov, S., Beličev, P., Ivanenko, I., Cirkovic, S., Vorozhtsov, A., Bojović, B., Dobrosavljević, A. S., Vujović, V. V., Čomor, J. J.,& Pajović, S. B.. (2003). Status report of the VINCY cyclotron. in Nukleonika, 48, S135-S139.
https://hdl.handle.net/21.15107/rcub_vinar_6381

Nešković NB, Ristić-Đurović JL, Vorojtsov S, Beličev P, Ivanenko I, Cirkovic S, Vorozhtsov A, Bojović B, Dobrosavljević AS, Vujović VV, Čomor JJ, Pajović SB. Status report of the VINCY cyclotron. in Nukleonika. 2003;48:S135-S139.
https://hdl.handle.net/21.15107/rcub_vinar_6381 .

Nešković, Nebojša B., Ristić-Đurović, Jasna L., Vorojtsov, SB, Beličev, Petar, Ivanenko, IA, Cirkovic, S, Vorozhtsov, AS, Bojović, Boško, Dobrosavljević, Aleksandar S., Vujović, Velibor V., Čomor, Jožef J., Pajović, Snežana B., "Status report of the VINCY cyclotron" in Nukleonika, 48 (2003):S135-S139,
https://hdl.handle.net/21.15107/rcub_vinar_6381 .

TY  - JOUR
AU  - Bojović, Boško
AU  - Elazar, Jovan
AU  - Tomić, S.
PY  - 1999
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/2238
AB  - A new fiber-optical dee position measurement system is developed for the VINCY cyclotron. The system includes a sensor head, a coherent optical fiber bundle and a light detector with control electronics. The sensor head is placed in the dee, all the electronic components are placed out of the vacuum chamber of the machine, while the position information is carried by the optical fiber bundle. Two sensor heads on the dee enable the measurement of the position of the dee tip in all three dimensions, as well as the twist of the dee, with a resolution better than 50 mu m. The precise dee position measurement can be useful for beam optimization, study of sparking phenomena, and study of phenomena causing errors in RF cavity geometry (vacuum, heating, etc.) These points tend to be even more important in future high current machines. (C) 1999 Elsevier Science B.V. All rights reserved.
T2  - Nuclear Instruments and Methods in Physics Research. Section A: Accelerators, Spectrometers, Detectors, and Associated Equipment
T1  - Application of a precise fiber-optical dee position measurement system in the cyclotron RF system design
VL  - 425
IS  - 3
SP  - 460
EP  - 468
DO  - 10.1016/S0168-9002(98)01444-2
ER  - 

@article{
author = "Bojović, Boško and Elazar, Jovan and Tomić, S.",
year = "1999",
abstract = "A new fiber-optical dee position measurement system is developed for the VINCY cyclotron. The system includes a sensor head, a coherent optical fiber bundle and a light detector with control electronics. The sensor head is placed in the dee, all the electronic components are placed out of the vacuum chamber of the machine, while the position information is carried by the optical fiber bundle. Two sensor heads on the dee enable the measurement of the position of the dee tip in all three dimensions, as well as the twist of the dee, with a resolution better than 50 mu m. The precise dee position measurement can be useful for beam optimization, study of sparking phenomena, and study of phenomena causing errors in RF cavity geometry (vacuum, heating, etc.) These points tend to be even more important in future high current machines. (C) 1999 Elsevier Science B.V. All rights reserved.",
journal = "Nuclear Instruments and Methods in Physics Research. Section A: Accelerators, Spectrometers, Detectors, and Associated Equipment",
title = "Application of a precise fiber-optical dee position measurement system in the cyclotron RF system design",
volume = "425",
number = "3",
pages = "460-468",
doi = "10.1016/S0168-9002(98)01444-2"
}

Bojović, B., Elazar, J.,& Tomić, S.. (1999). Application of a precise fiber-optical dee position measurement system in the cyclotron RF system design. in Nuclear Instruments and Methods in Physics Research. Section A: Accelerators, Spectrometers, Detectors, and Associated Equipment, 425(3), 460-468.
https://doi.org/10.1016/S0168-9002(98)01444-2

Bojović B, Elazar J, Tomić S. Application of a precise fiber-optical dee position measurement system in the cyclotron RF system design. in Nuclear Instruments and Methods in Physics Research. Section A: Accelerators, Spectrometers, Detectors, and Associated Equipment. 1999;425(3):460-468.
doi:10.1016/S0168-9002(98)01444-2 .

Bojović, Boško, Elazar, Jovan, Tomić, S., "Application of a precise fiber-optical dee position measurement system in the cyclotron RF system design" in Nuclear Instruments and Methods in Physics Research. Section A: Accelerators, Spectrometers, Detectors, and Associated Equipment, 425, no. 3 (1999):460-468,
https://doi.org/10.1016/S0168-9002(98)01444-2 . .

TY  - JOUR
AU  - Bojović, Boško
AU  - Popović, Branko D.
PY  - 1998
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/2186
AB  - A new concept of impedance matching for an RF amplifier coupled to a cyclotron cavity, named detuned primary coupling, is proposed. It does not require the motion of the coupling loop in vacuum and the matching for different working frequencies is performed by detuning the eigenfrequency of the amplifier cabinet alone by means of a variable capacitor. A simple mathematical approach used in the design procedure is presented. Measurements on the 1 : 1 scale model of the VINCY cyclotron RF system have been carried out in the operating frequencies range. The results confirm the viability of the concept and the use of this approach in cyclotron RF amplifier coupling. (C) 1998 Elsevier Science B.V. All rights reserved.
T2  - Nuclear Instruments and Methods in Physics Research. Section A: Accelerators, Spectrometers, Detectors, and Associated Equipment
T1  - Detuned primary RF coupling system for variable frequency cyclotrons
VL  - 413
IS  - 1
SP  - 7
EP  - 16
DO  - 10.1016/S0168-9002(98)00545-2
ER  - 

@article{
author = "Bojović, Boško and Popović, Branko D.",
year = "1998",
abstract = "A new concept of impedance matching for an RF amplifier coupled to a cyclotron cavity, named detuned primary coupling, is proposed. It does not require the motion of the coupling loop in vacuum and the matching for different working frequencies is performed by detuning the eigenfrequency of the amplifier cabinet alone by means of a variable capacitor. A simple mathematical approach used in the design procedure is presented. Measurements on the 1 : 1 scale model of the VINCY cyclotron RF system have been carried out in the operating frequencies range. The results confirm the viability of the concept and the use of this approach in cyclotron RF amplifier coupling. (C) 1998 Elsevier Science B.V. All rights reserved.",
journal = "Nuclear Instruments and Methods in Physics Research. Section A: Accelerators, Spectrometers, Detectors, and Associated Equipment",
title = "Detuned primary RF coupling system for variable frequency cyclotrons",
volume = "413",
number = "1",
pages = "7-16",
doi = "10.1016/S0168-9002(98)00545-2"
}

Bojović, B.,& Popović, B. D.. (1998). Detuned primary RF coupling system for variable frequency cyclotrons. in Nuclear Instruments and Methods in Physics Research. Section A: Accelerators, Spectrometers, Detectors, and Associated Equipment, 413(1), 7-16.
https://doi.org/10.1016/S0168-9002(98)00545-2

Bojović B, Popović BD. Detuned primary RF coupling system for variable frequency cyclotrons. in Nuclear Instruments and Methods in Physics Research. Section A: Accelerators, Spectrometers, Detectors, and Associated Equipment. 1998;413(1):7-16.
doi:10.1016/S0168-9002(98)00545-2 .

Bojović, Boško, Popović, Branko D., "Detuned primary RF coupling system for variable frequency cyclotrons" in Nuclear Instruments and Methods in Physics Research. Section A: Accelerators, Spectrometers, Detectors, and Associated Equipment, 413, no. 1 (1998):7-16,
https://doi.org/10.1016/S0168-9002(98)00545-2 . .