变形磁共振弥散张量图像的三维非线性配准  

The 3D Nonlinear Image Registration for Distortions in MR Diffusion Tensor Imaging

作　　者：姚旭峰[1,2] 徐小萍[1] 聂生东[1] 宋志坚[2] 

机构地区：[1]上海理工大学医疗器械学院(上海医疗器械高等专科学校),上海200093 [2]复旦大学数字医学中心,上海200032

出　　处：《生物医学工程研究》2009年第4期280-284,共5页Journal Of Biomedical Engineering Research

摘　　要：对于磁共振弥散张量成像的图像变形,采用3D非线性图像配准的方法来纠正。在基准磁共振图像和变形弥散张量图像分割的基础上,以互信息为相似性测度,分别采用单级与双级B样条变换来纠正畸变。弥散张量成像由涡流及组织磁敏感性差异引起的几何畸变得到了明显纠正,且与单级B样条变换相比,双级B样条变换更具有鲁棒性。采用3D非线性图像配准可对变形图像进行纠正,明显提高了图像质量。For the correction of distortions in diffusion tensor imaging(DTI),the method of 3D nonlinear image registration was proposed.Based on the segmentation of fiducial MR images and DTI images,the transformations of single resolution B Spline and muti-resolution B Spline were respectively implemented to correct the deformable images by the criterion of mutual information(MI).The geometric distortions in DTI induced by the eddy currents and the magnetic susceptibility differences among tissues were effectively r...

关 键 词：弥散张量成像 非线性图像配准 几何畸变 涡流 平面回波成像 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术]