|
|||||
|
|
| 基于水平集的3D左心室表面重建 | |
| 引用本文： | 周则明,王元全,王平安,夏德深.基于水平集的3D左心室表面重建[J].计算机研究与发展,2005,42(7):1173-1178. |
| 作者姓名： | 周则明 王元全 王平安 夏德深 |
| 作者单位： | 1. 南京理工大学计算机科学与工程系,南京,210094;解放军理工大学气象学院,南京,211101 2. 南京理工大学计算机科学与工程系,南京,210094 3. 香港中文大学计算机科学与工程系,香港 |
| 基金项目： | 香港特别行政区政府研究资助局资助项目(CUHK418001E,CUHK100C) |
| 摘 要： | 提出了基于分层2D MRI图像重建3D左心室表面的算法．分层2D MRI图像能够跟踪左心室边界在成像平面内的变形，但由于缺少层问数据，层间边界形变的信息难以获取．为了重建左心室的形状，使用基于形变模型的方法：首先建立变形曲面的动力学方程；再将成像坐标系中的图像平面映射到重建坐标系，根据图像数据构造外力，使用平均曲率构造变形曲面的弹性力，然后用水平集数值解法求解动力学方程以重建左心室的表面．实验结果证明了算法的有效性． |
| 关 键 词： | 核磁共振成像 分层MRI图像 变形模型 水平集方法 表面重建 |
3D Left Ventricle Surface Reconstruction Based on Level Sets |
|
| Zhou Zeming,Wang Yuanquan,Pheng Ann Heng,Xia Deshen.3D Left Ventricle Surface Reconstruction Based on Level Sets[J].Journal of Computer Research and Development,2005,42(7):1173-1178. | |
| Authors: | Zhou Zeming Wang Yuanquan Pheng Ann Heng Xia Deshen |
| Affiliation: | Zhou Zeming 1,3,Wang Yuanquan1,Pheng Ann Heng2,and Xia Deshen1 1 |
| Abstract: | A 3D left ventricle (LV) surface reconstruction algorithm is proposed by using 2D MRI slices. MRI slices can capture the boundary deformation in the imaging planes, but the boundary deformation information between slices cannot be achieved due to the lack of imaging data. A deformable model is used to reconstruct the shape of the LV: first, the dynamic equation governing the surface deformation is deduced; secondly the image planes are mapped to the reconstruction coordinate system. From the slices data, the external force exerted on the surface is defined and the elastic force of the surface is constructed by mean curvature of the deformation surface. Finally, a level set method is applied to solve the dynamic equation for LV shape. The results of the experiments demonstrate the effectiveness of the reconstruction algorithm. |
| Keywords: | MRI MRI slices deformable models level set method surface reconstruction |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ | |