Determination of absorbed dose for high-energy electron beams with TG-51 protocol
- VernacularTitle:高能电子束吸收剂量TG-51测定方法
- Author:
Bing LI
;
Xiaoping WANG
;
Hong LU
;
Jingling WANG
;
- Publication Type:Journal Article
- Keywords:
Absorbed dose;
Dosimetry;
Electron beam
- From:
Journal of Medical Postgraduates
2003;0(06):-
- CountryChina
- Language:Chinese
-
Abstract:
Objectives:To introduce a new calibration protocol for clinical reference dosimetry of high energy electron beams published by Radiation Therapy Task Group 51, American Association of Physicists in Medicine. Methods:According to the new protocol, measuring the absorbed dose of 5, 6, 7, 9, 10 and 12 MeV Electrons produced by the Siemens M6740 accelerator of our hospital with the help of the Capintec-192 electrometer and PR 06C chamber. Results:For 7-12 MeV, the discrepancies vary from -0.1% to 0.7% between TG 51 and TG 21, and from -0.3% to 0.4% between TG 51 and JJG1026 91. For 5 and 6 MeV, there are 1.7% and 1.5% discrepancies between TG 51 and TG 21, and -1.6% and 1.7% between TG 51 and JJG1026 91. Conclusions:The new protocol is more accurate and convenient because of its precise rationale and concise formulae.
