| Yang Jing,Chen Mi,Liang Zhiwen,et al.Evaluation on repeatability of the aperture sizes of CyberKnife VSITM Iris collimator[J].Chinese Journal of Radiological Medicine and Protection,2016,36(4):291-293 |
| Evaluation on repeatability of the aperture sizes of CyberKnife VSITM Iris collimator |
| Received:December 09, 2015 |
| DOI：10.3760/cma.j.issn.0254-5098.2016.04.012 |
| KeyWords:CyberKnife Iris variable aperture collimator Film |
| FundProject: |
| Author Name | Affiliation | E-mail | | Yang Jing | Cancer Center, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China | | | Chen Mi | Cancer Center, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China | | | Liang Zhiwen | Cancer Center, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China | | | Hu Bin | Cancer Center, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China | | | Cheng Junping | Cancer Center, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China | | | Li Qin | Cancer Center, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China | 675181445@qq.com |
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| Abstract:: |
| Objective To evaluate the repeatability of the aperture sizes based on the Iris variable aperture collimator (Iris collimator) of CyberKnife VSITM. Methods Radiochromic films were placed at 800 mm of source-to-axis distance (SAD), and Iris quality assurance (QA) software was used to extract the information from the digital images, which were exposured by X-ray beams. Results The average aperture accuracy of Iris collimator was better than 0.11 mm over the beam range 5-40 mm, and the accuracy for 50 mm and 60 mm beams was within 0.19 mm. Conclusions The results suggest a good repeatability of aperture sizes for the CyberKnife VSITM Iris collimator. |
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