基于轮廓的力矩主轴法在医学图像配准中的应用  

Principal axes algorithm based on image contour applied to medical image registration

作　　者：吴锋[1] 钱宗才[1] 杭洽时[1] 石明国[1] 马东[1] 

机构地区：[1]第四军医大学生物医学工程系计算机应用教研室,陕西西安710033

出　　处：《第四军医大学学报》2001年第6期567-569,共3页Journal of the Fourth Military Medical University

摘　　要：目的　实现头部 CT与 MR图像的刚性配准 .方法　不同模态的医学图像所能提供的解剖结构和功能信息各不相同 ,为了给医学诊断和治疗计划提供更加准确全面的图像依据 ,对多种模态的医学图像进行配准和融合就显得尤为重要 .针对头部 CT与 MR图像轮廓清楚的特点 ,提出了一种基于轮廓的力矩主轴法配准方法 ,该方法通过提取图像的外围轮廓 ,计算出图像轮廓的质心及主轴 ,通过旋转和平移变换使两幅图像的质心及主轴对齐 ,从而达到配准的目的 .结果　通过对实际图像进行配准 ,结果比较理想 .结论　该方法具有速度快、无需人的参与、精度较高等特点 。AIM To perform CT MR registration. METHODS There are different medical information in different modal image. To give doctors more accurate and general image information in medical plan, the registration and fusion of images are important. Because there are clear contours in CT and MR image, we presented a registration method based on principal axes. Through matching the centrid and principal axes of image, registraion can be performed. RESULTS Practical registration was performed and the result was good. CONCLUSION This registration method has advantages of less computing time, no person needed, and the accuracy is better. So it is a good method of image registration.

关 键 词：图像解释 计算机辅助 力矩主轴 图像变换 

分 类 号：R318[医药卫生—生物医学工程]