TY  - JOUR
AU  - Siiskonen, Teemu
AU  - Gallagher, Aoife
AU  - Ciraj-Bjelac, Olivera
AU  - Novak, Leos
AU  - Sans Merce, Marta
AU  - Farah, Jad
AU  - Dabin, Jérémie
AU  - Malchair, Françoise
AU  - Knežević, Željka
AU  - Kortesniemi, Mika
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9838
AB  - Cone beam computed tomography (CBCT) has been available since the late 1990s for use in dentistry. European legislation requires optimisation of protection and the use of diagnostic reference levels (DRLs) as well as regular quality control (QC) of the imaging devices, which is well outlined in existing international recommendations. Nevertheless, the level of application is not known. Earlier studies have indicated that few European countries have established DRLs and that patient doses (exposure parameters) have not been properly optimised. The EURADOS Working Group 12-Dosimetry in Medical Imaging undertook a survey to identify existing practices in Member States. Questionnaires were developed to identify equipment types, clinical procedures performed, and exposure settings used. The surveys were circulated to 22 countries resulting in 28 responses from 13 countries. Variations were identified in the exposure factors and in the doses delivered to patients for similar clinical indicators. Results confirm that patient doses are still not properly optimised and DRLs are largely not established. There is a need to promote the importance of performing QC testing of dental CBCT equipment and to further optimise patient exposure by establishment and use of DRLs as a part of a continuous optimisation process.
T2  - Journal of Radiological Protection: Official Journal of the Society for Radiological Protection
T1  - A European perspective on dental cone beam computed tomography systems with a focus on optimisation utilising diagnostic reference levels
VL  - 41
IS  - 2
DO  - 10.1088/1361-6498/abdd05
ER  - 

@article{
author = "Siiskonen, Teemu and Gallagher, Aoife and Ciraj-Bjelac, Olivera and Novak, Leos and Sans Merce, Marta and Farah, Jad and Dabin, Jérémie and Malchair, Françoise and Knežević, Željka and Kortesniemi, Mika",
year = "2021",
abstract = "Cone beam computed tomography (CBCT) has been available since the late 1990s for use in dentistry. European legislation requires optimisation of protection and the use of diagnostic reference levels (DRLs) as well as regular quality control (QC) of the imaging devices, which is well outlined in existing international recommendations. Nevertheless, the level of application is not known. Earlier studies have indicated that few European countries have established DRLs and that patient doses (exposure parameters) have not been properly optimised. The EURADOS Working Group 12-Dosimetry in Medical Imaging undertook a survey to identify existing practices in Member States. Questionnaires were developed to identify equipment types, clinical procedures performed, and exposure settings used. The surveys were circulated to 22 countries resulting in 28 responses from 13 countries. Variations were identified in the exposure factors and in the doses delivered to patients for similar clinical indicators. Results confirm that patient doses are still not properly optimised and DRLs are largely not established. There is a need to promote the importance of performing QC testing of dental CBCT equipment and to further optimise patient exposure by establishment and use of DRLs as a part of a continuous optimisation process.",
journal = "Journal of Radiological Protection: Official Journal of the Society for Radiological Protection",
title = "A European perspective on dental cone beam computed tomography systems with a focus on optimisation utilising diagnostic reference levels",
volume = "41",
number = "2",
doi = "10.1088/1361-6498/abdd05"
}

Siiskonen, T., Gallagher, A., Ciraj-Bjelac, O., Novak, L., Sans Merce, M., Farah, J., Dabin, J., Malchair, F., Knežević, Ž.,& Kortesniemi, M.. (2021). A European perspective on dental cone beam computed tomography systems with a focus on optimisation utilising diagnostic reference levels. in Journal of Radiological Protection: Official Journal of the Society for Radiological Protection, 41(2).
https://doi.org/10.1088/1361-6498/abdd05

Siiskonen T, Gallagher A, Ciraj-Bjelac O, Novak L, Sans Merce M, Farah J, Dabin J, Malchair F, Knežević Ž, Kortesniemi M. A European perspective on dental cone beam computed tomography systems with a focus on optimisation utilising diagnostic reference levels. in Journal of Radiological Protection: Official Journal of the Society for Radiological Protection. 2021;41(2).
doi:10.1088/1361-6498/abdd05 .

Siiskonen, Teemu, Gallagher, Aoife, Ciraj-Bjelac, Olivera, Novak, Leos, Sans Merce, Marta, Farah, Jad, Dabin, Jérémie, Malchair, Françoise, Knežević, Željka, Kortesniemi, Mika, "A European perspective on dental cone beam computed tomography systems with a focus on optimisation utilising diagnostic reference levels" in Journal of Radiological Protection: Official Journal of the Society for Radiological Protection, 41, no. 2 (2021),
https://doi.org/10.1088/1361-6498/abdd05 . .

TY  - JOUR
AU  - Hourdakis, Constantine J.
AU  - Bueermann, Ludwig
AU  - Ciraj-Bjelac, Olivera
AU  - Csete, Istvan
AU  - Delis, Harry
AU  - Gomola, Igor
AU  - Persson, Linda
AU  - Novak, Leos
AU  - Petkov, Ivailo
AU  - Toroi, Paula
PY  - 2016
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/271
AB  - A comparison of calibration results and procedures in terms of air kerma length product, P-KL, and air kerma, K, was conducted between eight dosimetry laboratories. A pencil-type ionization chamber (IC), generally used for computed tomography dose measurements, was calibrated according to three calibration methods, while its residual signal and other characteristics (sensitivity profile, active length) were assessed. The results showed that the partial irradiation method is the preferred method for the pencil-type IC calibration in terms of P-KL and it could be applied by the calibration laboratories successfully. Most of the participating laboratories achieved high level of agreement ( GT 99%) for both dosimetry quantities (P-KL and K). Estimated relative standard uncertainties of comparison results vary among laboratories from 0.34% to 2.32% depending on the quantity, beam quality and calibration method applied. Detailed analysis of the assigned uncertainties have been presented and discussed. (C) 2015 Associazione Italiana di Fisica Medica. Published by Elsevier Ltd. All rights reserved.
T2  - Physica Medica
T1  - Comparison of pencil-type ionization chamber calibration results and methods between dosimetry laboratories
VL  - 32
IS  - 1
SP  - 42
EP  - 51
DO  - 10.1016/j.ejmp.2015.09.008
ER  - 

@article{
author = "Hourdakis, Constantine J. and Bueermann, Ludwig and Ciraj-Bjelac, Olivera and Csete, Istvan and Delis, Harry and Gomola, Igor and Persson, Linda and Novak, Leos and Petkov, Ivailo and Toroi, Paula",
year = "2016",
abstract = "A comparison of calibration results and procedures in terms of air kerma length product, P-KL, and air kerma, K, was conducted between eight dosimetry laboratories. A pencil-type ionization chamber (IC), generally used for computed tomography dose measurements, was calibrated according to three calibration methods, while its residual signal and other characteristics (sensitivity profile, active length) were assessed. The results showed that the partial irradiation method is the preferred method for the pencil-type IC calibration in terms of P-KL and it could be applied by the calibration laboratories successfully. Most of the participating laboratories achieved high level of agreement ( GT 99%) for both dosimetry quantities (P-KL and K). Estimated relative standard uncertainties of comparison results vary among laboratories from 0.34% to 2.32% depending on the quantity, beam quality and calibration method applied. Detailed analysis of the assigned uncertainties have been presented and discussed. (C) 2015 Associazione Italiana di Fisica Medica. Published by Elsevier Ltd. All rights reserved.",
journal = "Physica Medica",
title = "Comparison of pencil-type ionization chamber calibration results and methods between dosimetry laboratories",
volume = "32",
number = "1",
pages = "42-51",
doi = "10.1016/j.ejmp.2015.09.008"
}

Hourdakis, C. J., Bueermann, L., Ciraj-Bjelac, O., Csete, I., Delis, H., Gomola, I., Persson, L., Novak, L., Petkov, I.,& Toroi, P.. (2016). Comparison of pencil-type ionization chamber calibration results and methods between dosimetry laboratories. in Physica Medica, 32(1), 42-51.
https://doi.org/10.1016/j.ejmp.2015.09.008

Hourdakis CJ, Bueermann L, Ciraj-Bjelac O, Csete I, Delis H, Gomola I, Persson L, Novak L, Petkov I, Toroi P. Comparison of pencil-type ionization chamber calibration results and methods between dosimetry laboratories. in Physica Medica. 2016;32(1):42-51.
doi:10.1016/j.ejmp.2015.09.008 .

Hourdakis, Constantine J., Bueermann, Ludwig, Ciraj-Bjelac, Olivera, Csete, Istvan, Delis, Harry, Gomola, Igor, Persson, Linda, Novak, Leos, Petkov, Ivailo, Toroi, Paula, "Comparison of pencil-type ionization chamber calibration results and methods between dosimetry laboratories" in Physica Medica, 32, no. 1 (2016):42-51,
https://doi.org/10.1016/j.ejmp.2015.09.008 . .

TY  - JOUR
AU  - Vassileva, Jenia
AU  - Rehani, Madan M.
AU  - Al-Dhuhli, Humoud
AU  - Al-Naemi, Huda M.
AU  - Al-Suwaidi, Jamila Salem
AU  - Appelgate, Kimberly
AU  - Aranđić, Danijela
AU  - Bashier, Einas Hamed Osman
AU  - Beganovic, Adnan
AU  - Benavente, Tony
AU  - Bieganski, Tadeusz
AU  - Dias, Simone
AU  - El-Nachef, Leila
AU  - Faj, Dario
AU  - Gamarra-Sanchez, Mirtha E.
AU  - Garcia-Aguilar, Juan
AU  - Gbelcova, L'ubka
AU  - Gershan, Vesna
AU  - Gershkevitsh, Eduard
AU  - Gruppetta, Edward
AU  - Hustuc, Alexandru
AU  - Ivanović, Sonja
AU  - Jauhari, Arif
AU  - Kharita, Mohammad Hassan
AU  - Kharuzhyk, Siarhei
AU  - Khelassi-Toutaoui, Nadia
AU  - Khosravi, Hamid Reza
AU  - Khoury, Helen
AU  - Kostova-Lefterova, Desislava
AU  - Kralik, Ivana
AU  - Liu, Lantao
AU  - Mazuoliene, Jolanta
AU  - Mora, Patricia
AU  - Muhogora, Wilbroad
AU  - Muthuvelu, Pirunthavany
AU  - Novak, Leos
AU  - Pallewatte, Aruna S.
AU  - Shaaban, Mohamed
AU  - Shelly, Esti
AU  - Stepanyan, Karapet
AU  - Teo, Eu-Leong Harvey J.
AU  - Thelsy, Naw
AU  - Visrutaratna, Pannee
AU  - Zaman, Areesha
AU  - Zontar, Dejan
PY  - 2012
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/4810
AB  - OBJECTIVE. The purpose of this study was to assess the frequency of pediatric CT in 40 less-resourced countries and to determine the level of appropriateness in CT use. MATERIALS AND METHODS. Data on the increase in the number of CT examinations during 2007 and 2009 and appropriate use of CT examinations were collected, using standard forms, from 146 CT facilities at 126 hospitals. RESULTS. The lowest frequency of pediatric CT examinations in 2009 was in European facilities (4.3%), and frequencies in Asia (12.2%) and Africa (7.8%) were twice as high. Head CT is the most common CT examination in children, amounting to nearly 75% of all pediatric CT examinations. Although regulations in many countries assign radiologists with the main responsibility of deciding whether a radiologic examination should be performed, in fact, radiologists alone were responsible for only 6.3% of situations. Written referral guidelines for imaging were not available in almost one half of the CT facilities. Appropriateness criteria for CT examinations in children did not always follow guidelines set by agencies, in particular, for patients with accidental head trauma, infants with congenital torticollis, children with possible ventriculoperitoneal shunt malfunction, and young children ( LT 5 years old) with acute sinusitis. In about one third of situations, nonavailability of previous images and records on previously received patient doses have the potential to lead to unnecessary examinations and radiation doses. CONCLUSION. With increasing use of CT in children and a lack of use of appropriateness criteria, there is a strong need to implement guidelines to avoid unnecessary radiation doses to children.
T2  - American Journal of Roentgenology
T1  - IAEA Survey of Pediatric CT Practice in 40 Countries in Asia, Europe, Latin America, and Africa: Part 1, Frequency and Appropriateness
VL  - 198
IS  - 5
SP  - 1021
EP  - 1031
DO  - 10.2214/AJR.11.7273
ER  - 

@article{
author = "Vassileva, Jenia and Rehani, Madan M. and Al-Dhuhli, Humoud and Al-Naemi, Huda M. and Al-Suwaidi, Jamila Salem and Appelgate, Kimberly and Aranđić, Danijela and Bashier, Einas Hamed Osman and Beganovic, Adnan and Benavente, Tony and Bieganski, Tadeusz and Dias, Simone and El-Nachef, Leila and Faj, Dario and Gamarra-Sanchez, Mirtha E. and Garcia-Aguilar, Juan and Gbelcova, L'ubka and Gershan, Vesna and Gershkevitsh, Eduard and Gruppetta, Edward and Hustuc, Alexandru and Ivanović, Sonja and Jauhari, Arif and Kharita, Mohammad Hassan and Kharuzhyk, Siarhei and Khelassi-Toutaoui, Nadia and Khosravi, Hamid Reza and Khoury, Helen and Kostova-Lefterova, Desislava and Kralik, Ivana and Liu, Lantao and Mazuoliene, Jolanta and Mora, Patricia and Muhogora, Wilbroad and Muthuvelu, Pirunthavany and Novak, Leos and Pallewatte, Aruna S. and Shaaban, Mohamed and Shelly, Esti and Stepanyan, Karapet and Teo, Eu-Leong Harvey J. and Thelsy, Naw and Visrutaratna, Pannee and Zaman, Areesha and Zontar, Dejan",
year = "2012",
abstract = "OBJECTIVE. The purpose of this study was to assess the frequency of pediatric CT in 40 less-resourced countries and to determine the level of appropriateness in CT use. MATERIALS AND METHODS. Data on the increase in the number of CT examinations during 2007 and 2009 and appropriate use of CT examinations were collected, using standard forms, from 146 CT facilities at 126 hospitals. RESULTS. The lowest frequency of pediatric CT examinations in 2009 was in European facilities (4.3%), and frequencies in Asia (12.2%) and Africa (7.8%) were twice as high. Head CT is the most common CT examination in children, amounting to nearly 75% of all pediatric CT examinations. Although regulations in many countries assign radiologists with the main responsibility of deciding whether a radiologic examination should be performed, in fact, radiologists alone were responsible for only 6.3% of situations. Written referral guidelines for imaging were not available in almost one half of the CT facilities. Appropriateness criteria for CT examinations in children did not always follow guidelines set by agencies, in particular, for patients with accidental head trauma, infants with congenital torticollis, children with possible ventriculoperitoneal shunt malfunction, and young children ( LT 5 years old) with acute sinusitis. In about one third of situations, nonavailability of previous images and records on previously received patient doses have the potential to lead to unnecessary examinations and radiation doses. CONCLUSION. With increasing use of CT in children and a lack of use of appropriateness criteria, there is a strong need to implement guidelines to avoid unnecessary radiation doses to children.",
journal = "American Journal of Roentgenology",
title = "IAEA Survey of Pediatric CT Practice in 40 Countries in Asia, Europe, Latin America, and Africa: Part 1, Frequency and Appropriateness",
volume = "198",
number = "5",
pages = "1021-1031",
doi = "10.2214/AJR.11.7273"
}

Vassileva, J., Rehani, M. M., Al-Dhuhli, H., Al-Naemi, H. M., Al-Suwaidi, J. S., Appelgate, K., Aranđić, D., Bashier, E. H. O., Beganovic, A., Benavente, T., Bieganski, T., Dias, S., El-Nachef, L., Faj, D., Gamarra-Sanchez, M. E., Garcia-Aguilar, J., Gbelcova, L., Gershan, V., Gershkevitsh, E., Gruppetta, E., Hustuc, A., Ivanović, S., Jauhari, A., Kharita, M. H., Kharuzhyk, S., Khelassi-Toutaoui, N., Khosravi, H. R., Khoury, H., Kostova-Lefterova, D., Kralik, I., Liu, L., Mazuoliene, J., Mora, P., Muhogora, W., Muthuvelu, P., Novak, L., Pallewatte, A. S., Shaaban, M., Shelly, E., Stepanyan, K., Teo, E. H. J., Thelsy, N., Visrutaratna, P., Zaman, A.,& Zontar, D.. (2012). IAEA Survey of Pediatric CT Practice in 40 Countries in Asia, Europe, Latin America, and Africa: Part 1, Frequency and Appropriateness. in American Journal of Roentgenology, 198(5), 1021-1031.
https://doi.org/10.2214/AJR.11.7273

Vassileva J, Rehani MM, Al-Dhuhli H, Al-Naemi HM, Al-Suwaidi JS, Appelgate K, Aranđić D, Bashier EHO, Beganovic A, Benavente T, Bieganski T, Dias S, El-Nachef L, Faj D, Gamarra-Sanchez ME, Garcia-Aguilar J, Gbelcova L, Gershan V, Gershkevitsh E, Gruppetta E, Hustuc A, Ivanović S, Jauhari A, Kharita MH, Kharuzhyk S, Khelassi-Toutaoui N, Khosravi HR, Khoury H, Kostova-Lefterova D, Kralik I, Liu L, Mazuoliene J, Mora P, Muhogora W, Muthuvelu P, Novak L, Pallewatte AS, Shaaban M, Shelly E, Stepanyan K, Teo EHJ, Thelsy N, Visrutaratna P, Zaman A, Zontar D. IAEA Survey of Pediatric CT Practice in 40 Countries in Asia, Europe, Latin America, and Africa: Part 1, Frequency and Appropriateness. in American Journal of Roentgenology. 2012;198(5):1021-1031.
doi:10.2214/AJR.11.7273 .

Vassileva, Jenia, Rehani, Madan M., Al-Dhuhli, Humoud, Al-Naemi, Huda M., Al-Suwaidi, Jamila Salem, Appelgate, Kimberly, Aranđić, Danijela, Bashier, Einas Hamed Osman, Beganovic, Adnan, Benavente, Tony, Bieganski, Tadeusz, Dias, Simone, El-Nachef, Leila, Faj, Dario, Gamarra-Sanchez, Mirtha E., Garcia-Aguilar, Juan, Gbelcova, L'ubka, Gershan, Vesna, Gershkevitsh, Eduard, Gruppetta, Edward, Hustuc, Alexandru, Ivanović, Sonja, Jauhari, Arif, Kharita, Mohammad Hassan, Kharuzhyk, Siarhei, Khelassi-Toutaoui, Nadia, Khosravi, Hamid Reza, Khoury, Helen, Kostova-Lefterova, Desislava, Kralik, Ivana, Liu, Lantao, Mazuoliene, Jolanta, Mora, Patricia, Muhogora, Wilbroad, Muthuvelu, Pirunthavany, Novak, Leos, Pallewatte, Aruna S., Shaaban, Mohamed, Shelly, Esti, Stepanyan, Karapet, Teo, Eu-Leong Harvey J., Thelsy, Naw, Visrutaratna, Pannee, Zaman, Areesha, Zontar, Dejan, "IAEA Survey of Pediatric CT Practice in 40 Countries in Asia, Europe, Latin America, and Africa: Part 1, Frequency and Appropriateness" in American Journal of Roentgenology, 198, no. 5 (2012):1021-1031,
https://doi.org/10.2214/AJR.11.7273 . .