Study of the verification of the source positioning and dwelling time based on the well-chamber
10.3760/cma.j.cn113030-20190916-00377
- VernacularTitle:基于井型电离室源驻留位置和驻留时间检测方法研究
- Author:
Qiang ZHAO
;
Xiangyang WU
;
Xiaobin CHANG
;
Tao FENG
;
Kun ZHANG
;
Ximei QU
;
Xuemin WANG
;
Di YANG
;
Jia DENG
- From:
Chinese Journal of Radiation Oncology
2021;30(3):278-282
- CountryChina
- Language:Chinese
-
Abstract:
Objective:To establish a dosimetric method based on the well-chamber to verify the accuracy of the source positioning and dwelling time for the afterloading machine, aiming to provide a new method for the quality control of afterloading machine.Methods:The principle of this method was explained according to the hardware structure of the well-chamber. Then, the precision of this method was analyzed by the simulation test and data fitting. The feasibility test was also performed. And the advantages and disadvantages of this method were compared with those of the traditional method.Results:The precision of this method for detecting the source positioning was 0.07 mm and the dwelling time was 0.09 s, respectively. In the feasibility test, the standard deviation of the measure value was below 3%.Conclusions:The well-chamber method has high precision and convenient operation. It can be applied in the rapid verification of the relative accuracy of the source positioning and dwelling time of well-chamber.
