Effect of X-ray exposure parameters on the false-node rate and radiation dose in CyberKnife spine tracking
10.3760/cma.j.issn.0254-5098.2014.02.014
- VernacularTitle:射波刀影像追踪中X射线曝光条件对脊柱追踪错误节点及辐射剂量的影响
- Author:
Rui ZHAO
;
Zhenyue WANG
;
Sha LI
;
Jun LIU
;
Xianghui ZHU
;
Xingxin GAO
- Publication Type:Journal Article
- Keywords:
CyberKnife;
Image-guidance;
Spine tracking;
Radiation dose
- From:
Chinese Journal of Radiological Medicine and Protection
2014;34(2):133-135
- CountryChina
- Language:Chinese
-
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.
