Comparison of Dosimetry Protocols for Electron Beam Radiotherapy Calibrations and Measurement Uncertainties
| العنوان: | Comparison of Dosimetry Protocols for Electron Beam Radiotherapy Calibrations and Measurement Uncertainties |
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| المؤلفون: | Fawzia E. M. Elbashir, Wassim Ksouri, Mohamed Hassan Eisa, Sitah Alanazi, Farouk Habbani, Abdelmoneim Sulieman, David A. Bradley, Ibrahim I. Suliman |
| المصدر: | Life, Vol 12, Iss 31, p 31 (2022) Life Volume 12 Issue 1 Pages: 31 |
| بيانات النشر: | MDPI AG, 2022. |
| سنة النشر: | 2022 |
| مصطلحات موضوعية: | medical LINAC, Space and Planetary Science, Science, Paleontology, absorbed dose standards, ionisation chamber, Article, General Biochemistry, Genetics and Molecular Biology, Ecology, Evolution, Behavior and Systematics, radiotherapy, radiation dosimetry |
| الوصف: | This paper presents guidelines for the calibration of radiation beams that were issued by the International Atomic Energy Agency (IAEA TRS 398), the American Association of Physicists in Medicine (AAPM TG 51) and the German task group (DIN 6800-2). These protocols are based on the use of an ionization chamber calibrated in terms of absorbed dose to water in a standard laboratory’s reference quality beam, where the previous protocols were based on air kerma standards. This study aims to determine uncertainties in dosimetry for electron beam radiotherapy using internationally established high-energy radiotherapy beam calibration standards. Methods: Dw was determined in 6-, 12- and 18 MeV electron energies under reference conditions using three cylindrical and two plane-parallel ion chambers in concert with the IAEA TRS 398, AAPM TG 51 and DIN 6800-2 absorbed dose protocols. From mean measured Dw values, the ratio TRS 398/TG 51 was found to vary between 0.988 and 1.004, while for the counterpart TRS 398/DIN 6800-2 and TG 51/DIN 6800-2, the variation ranges were 0.991–1.003 and 0.997–1.005, respectively. For the cylindrical chambers, the relative combined uncertainty (k = 1) in absorbed dose measurements was 1.44%, while for the plane-parallel chambers, it ranged from 1.53 to 1.88%. Conclusions: A high degree of consistency was demonstrated among the three protocols. It is suggested that in the use of the presently determined dose conversion factors across the three protocols, dose intercomparisons can be facilitated between radiotherapy centres. |
| وصف الملف: | application/pdf |
| اللغة: | English |
| تدمد: | 2075-1729 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3cbd22b601a557525fac13bada489827 https://www.mdpi.com/2075-1729/12/1/31 |
| حقوق: | OPEN |
| رقم الأكسشن: | edsair.doi.dedup.....3cbd22b601a557525fac13bada489827 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 20751729 |
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