摘要
本文考虑到病人在放射治疗过程中身体发生变形而使得基于固定模板匹配方法测量重复摆位误差精度降低的问题,提出了基于动态模板匹配的放疗病人重复摆位方法。该方法是对基于CT重建数字射线图像(DRR)作为模板进行匹配的重复摆位技术的改进,将能反映病人体态变化的视频重建三维体表模型作为匹配的模板进行摆位误差的计算。理论研究和实际检验表明,采用动态视频模板匹配的摆位方法,可以在保证摆位精度的同时消除因病人身体变形带来的不利影响。
The decrease of accuracy in patients＇ repeated positioning in radiotherapy due to body＇s transformation is considered in this paper. It brings forward a new patients＇ repeated positioning technique based on dynamic template matching method. And it is an optimization of the matching method based on the CT digitally reconstructed radiograph （DRR）, which uses the video reconstructed 3D surface model that can reflect the body＇s transformation as the matching template instead of DRR. This method is studied in theory and testified in practice, and it can not only guarantee the positioning accuracy but also eliminate the adverse influence brought by body＇s transformation.
出处
《中国医学影像技术》
CSCD
北大核心
2005年第12期1926-1929,共4页
Chinese Journal of Medical Imaging Technology
关键词
体态变形
固定模板
动态模板
三维体表模型
匹配
重复摆位
Body＇s transformation
Fixed template
Dynamic template
Three-dimensional surface model
Matching method
Repeated positioning
