| Du Yi,Yue Haizhen,Wang Meijiao,Zhou Shun,Yu Songmao,Wu Hao.Application of a new method for patient positioning based on optical surface monitoring technology to head radiotherapy[J].Chinese Journal of Radiological Medicine and Protection,2020,40(3):209-215 |
| Application of a new method for patient positioning based on optical surface monitoring technology to head radiotherapy |
| Received:November 04, 2019 |
| DOI：10.3760/cma.j.issn.0254-5098.2020.03.009 |
| KeyWords:Set-up errors Image guided radiotherapy Six degrees of freedom (6DoF) couch Optical surface monitoring technology |
| FundProject:北京市自然科学基金（1202009）；北京市属医院科研培育计划项目（PX2019042）；首都卫生发展科研专项（首发2018-4-1027）；教育部科技发展中心产学研创新基金-"智融兴教"基金（2018A01019）；国家重大研发计划（2019YFF01014405） |
| Author Name | Affiliation | E-mail | | Du Yi | Key Laboratory of Carcinogenesis and Translational Research(Ministry of Education), Department of Radiotherapy, Peking University Cancer Hospital & Institute, Beijing 100142, China | | | Yue Haizhen | Key Laboratory of Carcinogenesis and Translational Research(Ministry of Education), Department of Radiotherapy, Peking University Cancer Hospital & Institute, Beijing 100142, China | | | Wang Meijiao | Key Laboratory of Carcinogenesis and Translational Research(Ministry of Education), Department of Radiotherapy, Peking University Cancer Hospital & Institute, Beijing 100142, China | | | Zhou Shun | Key Laboratory of Carcinogenesis and Translational Research(Ministry of Education), Department of Radiotherapy, Peking University Cancer Hospital & Institute, Beijing 100142, China | | | Yu Songmao | Key Laboratory of Carcinogenesis and Translational Research(Ministry of Education), Department of Radiotherapy, Peking University Cancer Hospital & Institute, Beijing 100142, China | | | Wu Hao | Key Laboratory of Carcinogenesis and Translational Research(Ministry of Education), Department of Radiotherapy, Peking University Cancer Hospital & Institute, Beijing 100142, China | hao.wu@bjcancer.org |
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| Abstract:: |
| Objective To develop a new method to set up patients using optical surface monitoring system and to compare it with the conventional method in head radiotherapy. Methods A total of 358 set-ups (130 with the conventional method and 228 with the new method), which were from 99 head tumor patients in Beijing Cancer Hospital treated between May 2018 to April 2019, obtained by using Image Guided Radiotherapy were retrospectively analyzed. The distributions of set-up errors, the number of abnormal positions, and the set-up time were compared to evaluate the potential advantages of the new method. Results The mean (±standard deviation) absolute values of setup errors of the new method were (0.07±0.07), (0.08±0.06) and (0.06±0.06) cm for the vertical, lateral, and longitudinal, (0.53±0.41)°, (0.59±0.44)° and (0.59±0.46)° for the rotation, pitch and roll, respectively. In the new method, the setup accuracy was improved(t=3.24-6.10, P<0.001)and the number of abnormal positions was greatly reduced(χ2=60.66, P<0.001). Compared with the conventional method, the patient setup time was slightly reduced by the new method, but the difference was not statistically significant (P>0.05). Conclusions The new high-precision method to set up patients using optical surface monitoring system improves the accuracy of patients' position, decreases the corrections applied by 6DoF couch, reduces the probability of abnormal positions, and suggests the potential benefit in head radiotherapy. |
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