Contribution of Activation Products to Occupational Exposure Following Treatment Using High-Energy Photons in Radiotherapy
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Petrović, NinaKrestic-Vesovic, Jelena
Stojanovic, Darko
Ciraj-Bjelac, Olivera
Lazarević, Đorđe R.
Kovačević, Milojko
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When high-energy photon beams are used for irradiation in radiotherapy, neutrons that are the result of photonuclear reactions create activation products that affect the occupational dose of radiotherapy staff. For the assessment of activation products in situ gamma spectroscopy was performed parallel to dose-rate measurements following irradiation, by using a high-energy photon beam from a linear accelerator Elekta Precise (Elekta, Stockholm, Sweden) used in radiotherapy. The major identified activation products were the following radioisotopes: (28)Al, (24)Na, (56)Mn, (54)Mn, (187)W, (64)Cu and (62)Cu. Based on the typical workload and dose-rate measurement, the assessed additional annual occupational dose ranged from 1.7 to 0.25 mSv. As the measured dose rate arising from the activation products rapidly decreases as a function of time, the assessed additional dose is negligible after 10 min following irradiation. To keep the occupational dose as low as reasonably achievable, it is r...ecommended to delay entrance to the therapy room at least 2-4 min, when high-energy photons are used. This would reduce the effective dose by 30 %.
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Radiation Protection Dosimetry, 2011, 143, 1, 109-112Funding / projects:
- Zaštita od zračenja-fundamentalni, teorijski i eksperimentalni fizički aspekti (RS-MESTD-MPN2006-2010-141041)
DOI: 10.1093/rpd/ncq290
ISSN: 0144-8420
PubMed: 20947589
WoS: 000287391800018
Scopus: 2-s2.0-78651427258
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VinčaTY - JOUR AU - Petrović, Nina AU - Krestic-Vesovic, Jelena AU - Stojanovic, Darko AU - Ciraj-Bjelac, Olivera AU - Lazarević, Đorđe R. AU - Kovačević, Milojko PY - 2011 UR - https://vinar.vin.bg.ac.rs/handle/123456789/4224 AB - When high-energy photon beams are used for irradiation in radiotherapy, neutrons that are the result of photonuclear reactions create activation products that affect the occupational dose of radiotherapy staff. For the assessment of activation products in situ gamma spectroscopy was performed parallel to dose-rate measurements following irradiation, by using a high-energy photon beam from a linear accelerator Elekta Precise (Elekta, Stockholm, Sweden) used in radiotherapy. The major identified activation products were the following radioisotopes: (28)Al, (24)Na, (56)Mn, (54)Mn, (187)W, (64)Cu and (62)Cu. Based on the typical workload and dose-rate measurement, the assessed additional annual occupational dose ranged from 1.7 to 0.25 mSv. As the measured dose rate arising from the activation products rapidly decreases as a function of time, the assessed additional dose is negligible after 10 min following irradiation. To keep the occupational dose as low as reasonably achievable, it is recommended to delay entrance to the therapy room at least 2-4 min, when high-energy photons are used. This would reduce the effective dose by 30 %. T2 - Radiation Protection Dosimetry T1 - Contribution of Activation Products to Occupational Exposure Following Treatment Using High-Energy Photons in Radiotherapy VL - 143 IS - 1 SP - 109 EP - 112 DO - 10.1093/rpd/ncq290 ER -
@article{ author = "Petrović, Nina and Krestic-Vesovic, Jelena and Stojanovic, Darko and Ciraj-Bjelac, Olivera and Lazarević, Đorđe R. and Kovačević, Milojko", year = "2011", abstract = "When high-energy photon beams are used for irradiation in radiotherapy, neutrons that are the result of photonuclear reactions create activation products that affect the occupational dose of radiotherapy staff. For the assessment of activation products in situ gamma spectroscopy was performed parallel to dose-rate measurements following irradiation, by using a high-energy photon beam from a linear accelerator Elekta Precise (Elekta, Stockholm, Sweden) used in radiotherapy. The major identified activation products were the following radioisotopes: (28)Al, (24)Na, (56)Mn, (54)Mn, (187)W, (64)Cu and (62)Cu. Based on the typical workload and dose-rate measurement, the assessed additional annual occupational dose ranged from 1.7 to 0.25 mSv. As the measured dose rate arising from the activation products rapidly decreases as a function of time, the assessed additional dose is negligible after 10 min following irradiation. To keep the occupational dose as low as reasonably achievable, it is recommended to delay entrance to the therapy room at least 2-4 min, when high-energy photons are used. This would reduce the effective dose by 30 %.", journal = "Radiation Protection Dosimetry", title = "Contribution of Activation Products to Occupational Exposure Following Treatment Using High-Energy Photons in Radiotherapy", volume = "143", number = "1", pages = "109-112", doi = "10.1093/rpd/ncq290" }
Petrović, N., Krestic-Vesovic, J., Stojanovic, D., Ciraj-Bjelac, O., Lazarević, Đ. R.,& Kovačević, M.. (2011). Contribution of Activation Products to Occupational Exposure Following Treatment Using High-Energy Photons in Radiotherapy. in Radiation Protection Dosimetry, 143(1), 109-112. https://doi.org/10.1093/rpd/ncq290
Petrović N, Krestic-Vesovic J, Stojanovic D, Ciraj-Bjelac O, Lazarević ĐR, Kovačević M. Contribution of Activation Products to Occupational Exposure Following Treatment Using High-Energy Photons in Radiotherapy. in Radiation Protection Dosimetry. 2011;143(1):109-112. doi:10.1093/rpd/ncq290 .
Petrović, Nina, Krestic-Vesovic, Jelena, Stojanovic, Darko, Ciraj-Bjelac, Olivera, Lazarević, Đorđe R., Kovačević, Milojko, "Contribution of Activation Products to Occupational Exposure Following Treatment Using High-Energy Photons in Radiotherapy" in Radiation Protection Dosimetry, 143, no. 1 (2011):109-112, https://doi.org/10.1093/rpd/ncq290 . .