| Zhang Yanxin,Fang Hao,Chen Bing,et al.Analysis of the setup errors and residual errors for ExacTrac X-ray image-guidance system for radiotherapy of somal tumors[J].Chinese Journal of Radiological Medicine and Protection,2019,39(2):95-100 |
| Analysis of the setup errors and residual errors for ExacTrac X-ray image-guidance system for radiotherapy of somal tumors |
| Received:August 29, 2018 |
| DOI：10.3760/cma.j.issn.0254-5098.2019.02.003 |
| KeyWords:ExacTrac X-ray image-guidance system 6 degree-of-freedom treatment couch Setup errors Residual errors |
| FundProject:国家重点研发计划项目（2016YFC0904600） |
| Author Name | Affiliation | E-mail | | Zhang Yanxin | Department of Radiation Oncology, National Cancer Center, National Clinical Research Center for Cancer, Cancer Hospital, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing 100021, China | | | Fang Hao | Department of Radiation Oncology, National Cancer Center, National Clinical Research Center for Cancer, Cancer Hospital, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing 100021, China | | | Chen Bing | Department of Radiation Oncology, National Cancer Center, National Clinical Research Center for Cancer, Cancer Hospital, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing 100021, China | | | Zhang Wei | Department of Radiation Oncology, National Cancer Center, National Clinical Research Center for Cancer, Cancer Hospital, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing 100021, China | | | Qin Shirui | Department of Radiation Oncology, National Cancer Center, National Clinical Research Center for Cancer, Cancer Hospital, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing 100021, China | | | Wang Qian | Department of Radiation Oncology, National Cancer Center, National Clinical Research Center for Cancer, Cancer Hospital, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing 100021, China | | | Chen Cheng | Department of Radiation Oncology, National Cancer Center, National Clinical Research Center for Cancer, Cancer Hospital, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing 100021, China | | | Li Hongju | Department of Radiation Oncology, National Cancer Center, National Clinical Research Center for Cancer, Cancer Hospital, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing 100021, China | | | Fu Guishan | Department of Radiation Oncology, National Cancer Center, National Clinical Research Center for Cancer, Cancer Hospital, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing 100021, China | guishan11@163.com | | Dai Jianrong | Department of Radiation Oncology, National Cancer Center, National Clinical Research Center for Cancer, Cancer Hospital, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing 100021, China | |
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| Abstract:: |
| Objective To retrospectively analyze the setup error in radiotherapy of somal tumors and body metastases using the ExacTrac X-ray portal image, and to evaluate the feasibility and effectiveness of 6D setup error correction in body radiotherapy. Methods The translational and rotational setup errors were calculated by registering the bony structures on the ExacTrac X- setup images to that of the digitally reconstructed setup images, and the corresponding residual errors were calculated together. Results The translational and rotational setup errors in the x (left-right), y (superior-inferior), z (anterior-posterior) and Rx (sagittal), Ry (transverse), Rz (coronal) directions were(2.27±2.02)mm, (4.49±2.52)mm, (2.27±1.37) mm and (1.02±0.73)°, (0.67±0.68)°, (0.76±0.84)°, respectively. The residual translational and rotational setup errors in the x(r), y(r), z(r) and Rx(r), Ry(r), Rz(r) directions were(0.27±0.48)mm,(0.37±0.45)mm, (0.22±0.30)mm and (0.17±0.33)°, (0.14±0.34)°, (0.16±0.28)°respectively. Conclusions Besides the translational setup errors, a certain amount of rotational setup errors exist in radiotherapy of somal tumors and body metastases. By using the 6D setup error correction of the ExacTrac system, a translational less than 0.4 mm and rotational setup errors less than 0.2° could be achieved. |
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