用于计算机辅助肺穿的X射线机标定方法  

X-RAY DEVICE CALIBRATION METHOD FOR COMPUTER AIDED LUNG PUNCTURE

作　　者：陆建峰[1] 杨静宇[1] 唐振民[1] 胡雪蕾[1] 叶玉坤[2] 汪栋[2] 朱宏[2] 许鸣[2] 

机构地区：[1]南京理工大学计算机系,南京210094 [2]南京 81医院,南京210002

出　　处：《中国生物医学工程学报》2001年第3期230-235,205,共7页Chinese Journal of Biomedical Engineering

基　　金：卫生部"九五"国家重点科技攻关计划资助! (96 90 6 0 1 18)

摘　　要：本文根据计算机辅助肺穿的要求 ,提出了一种X射线机的标定方法。采用透视变换作为X射线机成像的几何模型 ,径向畸变作为其畸变模型 ,借鉴了摄像机标定技术 ,对X射线机的内外参数分别进行标定。由于内参数的标定是外参数标定的基础 ,并且比外参数标定的难度大 ,因此本文重点讨论了内参数的标定问题 ,给出了标定的详细过程和实验步骤。实验结果表明 。A calibration method for X ray device is proposed in this paper. Perspective transformation is used as its imaging geometrical model, and radial distortion as distortion model. Referring camera calibration, the proposed method calibrates the internal and external parameters of X ray device respectively. Because calibration of internal parameters is the foundation of that of external parameters and it′s more difficult than that of external parameters, this paper puts its emphasis on the calibration of internal parameters. Experiment results show that the proposed method can satisfy the practical use.

关 键 词：标定 透视变换 X射线成像 畸变 肺穿 

分 类 号：R816.41[医药卫生—放射医学]