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Article

Comparison of Dosimetry Protocols for Electron Beam Radiotherapy Calibrations and Measurement Uncertainties

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Department of Medical Physics, National Cancer Institute, University of Gezira, Wad Madani P.O. Box 1111, Sudan
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Department of Medical Physics, Centre de Radiothérapie Hartmann 4, Rue Kleber, CS90004, CEDEX, 92309 Levallois-Perret, France
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Department of Physics, College of Science, Imam Mohammad Ibn Saud Islamic University (IMSIU), Riyadh 11642, Saudi Arabia
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Department of Physics, Faculty of Science, University of Khartoum, Khartoum P.O. Box 321, Sudan
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Radiology and Medical Imaging Department, College of Applied Medical Sciences, Prince Sattam bin Abdulaziz University, Alkharj 11942, Saudi Arabia
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Centre for Applied Physics and Radiation Technologies, School of Engineering and Technology, Sunway University, Bandar Sunway 47500, Selangor, Malaysia
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Department of Physics, University of Surrey, Guildford GU2 7XH, UK
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Radiation and Nuclear Safety Institute, Sudan Atomic Energy Commission, Khartoum P.O. Box 3001, Sudan
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Author to whom correspondence should be addressed.
Academic Editors: Davide Bianco, Filomena Loffredo and Maria Quarto
Life 2022, 12(1), 31; https://doi.org/10.3390/life12010031
Received: 24 November 2021 / Revised: 21 December 2021 / Accepted: 22 December 2021 / Published: 26 December 2021
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. View Full-Text
Keywords: radiation dosimetry; radiotherapy; medical LINAC; ionisation chamber; absorbed dose standards radiation dosimetry; radiotherapy; medical LINAC; ionisation chamber; absorbed dose standards
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MDPI and ACS Style

Elbashir, F.E.M.; Ksouri, W.; Eisa, M.H.; Alanazi, S.; Habbani, F.; Sulieman, A.; Bradley, D.A.; Suliman, I.I. Comparison of Dosimetry Protocols for Electron Beam Radiotherapy Calibrations and Measurement Uncertainties. Life 2022, 12, 31. https://doi.org/10.3390/life12010031

AMA Style

Elbashir FEM, Ksouri W, Eisa MH, Alanazi S, Habbani F, Sulieman A, Bradley DA, Suliman II. Comparison of Dosimetry Protocols for Electron Beam Radiotherapy Calibrations and Measurement Uncertainties. Life. 2022; 12(1):31. https://doi.org/10.3390/life12010031

Chicago/Turabian Style

Elbashir, Fawzia E. M., Wassim Ksouri, Mohamed Hassan Eisa, Sitah Alanazi, Farouk Habbani, Abdelmoneim Sulieman, David A. Bradley, and Ibrahim I. Suliman. 2022. "Comparison of Dosimetry Protocols for Electron Beam Radiotherapy Calibrations and Measurement Uncertainties" Life 12, no. 1: 31. https://doi.org/10.3390/life12010031

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