Analysis of setup errors of postoperative intensity-modulated radiotherapy immobilized with integrated cervicothoracic board (mask) system in breast cancer patients
10.3760/cma.j.cn113030-20200229-00081
- VernacularTitle:乳腺癌术后调强放疗颈胸一体固定的摆位误差分析
- Author:
Yanxin ZHANG
1
;
Fukui HUAN
;
Gengqiang ZHU
;
Ke ZHOU
;
Xin FENG
;
Bao WAN
;
Yu TANG
;
Hao JING
;
Shulian WANG
;
Jianrong DAI
Author Information
1. 国家癌症中心/国家肿瘤临床医学研究中心/中国医学科学院北京协和医学院肿瘤医院放疗科 100021
- Keywords:
Setup error;
Integrated cervicothoracic board system;
Breast neoplasm/intensity-modulated radiotherapy
- From:
Chinese Journal of Radiation Oncology
2021;30(8):835-840
- CountryChina
- Language:Chinese
-
Abstract:
Objective:To investigate the setup errors of postoperative radiotherapy immobilized with integrated cervicothoracic board (mask) system in breast cancer patients.Methods:Thirty-two breast cancer patients treated with postoperative radiotherapy immobilized with integrated cervicothoracic board (mask) system were prospectively recruited in this study. Breast/chest wall (cw) and supra/infraclavicular nodal region (sc) were irradiated with intensity-modulated radiotherapy. CBCT location verification in radiotherapy and target areas of the breast/chest wall and upper and lower collarbone were carried out, respectively. The consistency between setup errors and the position of the upper and lower target areas of 239 CBCT images was analyzed.Results:The translational setup errors of the breast/chest wall in the X-cw (left-right), Y-cw (superior-inferior), Z-cw (anterior-posterior) directions were (1.84±2.36) mm, (1.99±2.48) mm, and (1.75±1.86) mm, respectively. The translational setup errors of the supra/infraclavicular nodal region in the X-sc (left-right), Y-sc (superior-inferior), Z-sc (anterior-posterior) directions were (1.98±2.44) mm, (1.98±2.48) mm, and (1.71±1.79) mm, respectively. The differences of translational setup errors between the breast/chest wall and supra/infraclavicular nodal region in the X, Y, Z directions were (0.38±0.66) mm, (0.07±0.41) mm, and (0.45±0.92) mm, respectively. Conclusion:For the breast cancer patients treated with postoperative radiotherapy covering breast/chest wall and supra/infraclavicular nodal region, the integrated cervicothoracic board (mask) immobilization system provides good reproducibility and yields Sfew setup errors.
