Feasibility study of using two dimensional array ion-chamber to verifiy relative dose distribution calculated with Acuros BV
10.3760/cma.j.issn.0254-5098.2020.01.011
- VernacularTitle: 二维矩阵电离室验证Acuros BV算法计算相对剂量分布的可行性研究
- Author:
Qiang ZHAO
1
;
Xiangyang WU
;
Xiaobin CHANG
;
Tao FENG
;
Di YANG
;
Kun ZHANG
;
Ximei QU
;
Xuemin WANG
;
Jia DENG
Author Information
1. Department of Radiotherapy, Shaanxi Provincial Cancer Hospital, Xi′an 710061, China
- Publication Type:Journal Article
- Keywords:
2D array ion-chamber;
Acuros BV;
Brachy therapy
- From:
Chinese Journal of Radiological Medicine and Protection
2020;40(1):59-63
- CountryChina
- Language:Chinese
-
Abstract:
Objective:To study the feasibility of using the PTW729 2D array ion-chamber to verify the relative dose distribution calculated with the Acuros BV algorithm. Both advantages and disadvantages of the method were analyzed to provide reference for practical clinical practices.
Methods:Based on self-built measurement phantoms, the dose distribution on the same slice of the phantom was measured with PTW729 and film, respectively, under the same measurement condition and plan. The dose distributions obtained by the two method were compared with the result calculated with Acuros BV, separately, by using γ analytical tool. And the stability of the PTW729 was tested.
Results:The γ comparison value was 95.9% between the film and Acuros BV, 98.9% between the PTW729 and Acuros BV and 88.0% between the film and PTW729, with 95.0%, 100.0%, and 100.0%, in their stability test respectively.
Conclusions:PTW729 2D array ion-chamber can be applied to the rapid verification of Acuros BV algorithm-calculated relative dose distribution.
