| Zhao Rui,Wang Zhenyue,Li Sha,Lu Jun,Zhu Xianghui,Gao Xingxin.Effect of X-ray exposure parameters on the false-node rate and radiation dose in CyberKnife spine tracking[J].Chinese Journal of Radiological Medicine and Protection,2014,34(2):133-135 |
| Effect of X-ray exposure parameters on the false-node rate and radiation dose in CyberKnife spine tracking |
| Received:July 04, 2013 |
| DOI：10.3760/cma.j.issn.0254-5098.2014.02.014 |
| KeyWords:CyberKnife Image-guidance Spine tracking Radiation dose |
| FundProject: |
| Author Name | Affiliation | | Zhao Rui | Department of Radiation Oncology, Lanzhou General Hospital, PLA, Lanzhou 730050, China | | Wang Zhenyue | Department of Radiation Oncology, Lanzhou General Hospital, PLA, Lanzhou 730050, China | | Li Sha | Department of Radiation Oncology, Lanzhou General Hospital, PLA, Lanzhou 730050, China | | Lu Jun | Department of Radiation Oncology, Lanzhou General Hospital, PLA, Lanzhou 730050, China | | Zhu Xianghui | Department of Radiation Oncology, Lanzhou General Hospital, PLA, Lanzhou 730050, China | | Gao Xingxin | Department of Radiation Oncology, Lanzhou General Hospital, PLA, Lanzhou 730050, China |
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| Abstract:: |
| Objective To explore the relationship of X-ray exposure parameters and false-node rate during image-guidance treatment with CyberKnife spine tracking. Methods Using spine tracking planning on a chest phantom, several combinations of X-ray exposure parameters were used to locate. The false-node ratio and the surface absorbed dose were investigated and the radiation dose was optimized. Results The false-node ratio and surface absorbed radiation dose decreased when the X-ray exposure parameters increased until they saturated. In the range of ≤5.0% false-node rate, the surface absorbed radiation dose was 0.11, 0.26 mGy, and 0.31-0.46 mGy, when the false-node rate was 2.77%,1.07% and 1.0%, respectively. Conclusions In image-guided treatment of CyberKnife, the radiation dose would be optimized,and the patient's radiation dose would be reduced greatly, which is important to protect the patients. |
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