| Meng Xiangyin,Yang Bo,Zhu Qizhen,Liang Yongguang,Zhou Zhen,Qiu Jie.Application of stereotactic body radiotherapy planning verification phantom in HyperArc technique for brain metastases[J].Chinese Journal of Radiological Medicine and Protection,2023,43(12):991-996 |
| Application of stereotactic body radiotherapy planning verification phantom in HyperArc technique for brain metastases |
| Received:March 17, 2023 |
| DOI：10.3760/cma.j.cn112271-20230317-00082 |
| KeyWords:StereoPhan phantom SRS MapCHECK semiconductor matrix HyperArc Dose verification |
| FundProject:国家重点研发计划资助(2022YFC2404606);中央高水平医院临床科研业务费资助项目(2022-PUMCH-B-116) |
| Author Name | Affiliation | E-mail | | Meng Xiangyin | Department of Radiation Oncology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100730, China | | | Yang Bo | Department of Radiation Oncology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100730, China | | | Zhu Qizhen | Department of Radiation Oncology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100730, China | | | Liang Yongguang | Department of Radiation Oncology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100730, China | | | Zhou Zhen | Department of Radiation Oncology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100730, China | | | Qiu Jie | Department of Radiation Oncology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100730, China | qiujie@pumch.cn |
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| Abstract:: |
| Objective To explore the feasibility of StereoPhan (SP) phantoms and SRS MapCHECK (SMC) semiconductor matrices in the dose verification of HyperArc (HA) plans for patients with brain metastases (BM).Methods A total of 16 BM patients who received HA radiotherapy in the Peking Union Medical College Hospital were enrolled in this study. The ion chamber and the SMC semiconductor matrix were inserted into SP phantoms, respectively. The point and planar doses in HA verification plans were measured and compared with the calculated data of the treatment planning system (TPS). The criteria for planar dose γ analysis were set at 2 mm/3%, 2 mm/2%, 1 mm/3%, and 1 mm/2%.Results The mean deviation of point doses in 16 patients was 1.33%±0.84%. Based on the above criteria, the γ pass rates of planar doses were 99.72%±0.46%, 98.93%±1.32%, 98.85%±1.79%, and 97.13%±3.19%, respectively.Conclusions SP phantoms and SMC semiconductor matrices are applicable to the dose verification of HA plans for BM patients. The analytical criteria of 3% and 1 mm/2% can be used for verifying point and planar doses, respectively. |
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