A study of an independent dose verification software for brachytherapy
10.3760/cma.j.issn.1004-4221.2020.02.012
- VernacularTitle: 后装放疗剂量验证软件研究
- Author:
Xianliang WANG
1
;
Pei WANG
1
;
Churong LI
1
;
Jie LI
1
;
Shengwei KANG
1
;
Min LIU
1
;
Ting TANG
1
;
Zhangwen WU
2
;
Qing HOU
2
Author Information
1. Department of Radiation Oncology, Sichuan Cancer Hospital& Institute, Chengdu, 610041, China
2. Key Laboratory of Radiation Physics and Technology, Institute of Nuclear Science and Technology, Sichuan University, Chengdu, 610064, China
- Publication Type:Journal Article
- Keywords:
Brachytherapy;
Dose verification;
Treatment planning system;
Quality assurance
- From:
Chinese Journal of Radiation Oncology
2020;29(2):131-135
- CountryChina
- Language:Chinese
-
Abstract:
Objective:To report an implementation method and results of an independent brachytherapy dose verification software (DVS).
Methods:The DVS was developed based on Visual C+ + and the modular structure design was adopted. The DICOM RT files exported from the treatment planning system (TPS) were automatically loaded into the DVS. The TG-43 formalism was employed for dose calculation. Six cervical cancer patients who underwent brachytherapy were retrospectively selected to test the DVS. Different applicators were utilized for each patient. Dosimetric parameters and γ analysis (0.1cm, 5%) were used to evaluate the dose difference between the DVS and the TPS.
Results:Compared with the TPS dose, the γ pass rates of the doses calculated by the DVS were higher than 98%. For CTV, the dosimetric differences were less than 0.29% and 0.53% for D100% and D90%. For bladder, rectum and sigmoid, the agreement of D0.1cm3, D1cm3 and D2cm3 within a 0.5% level.
Conclusion:With minimal human-computer interactions, the DVS can verify the accuracy of dose calculated by TPS for brachytherapy.
