3D cardiac motion reconstruction from CT data and tagged MRI.
3D cardiac motion reconstruction from CT data and tagged MRI.
复制标题
来自CT数据并标记为MRI的3D心脏运动重建。
DOI：
10.1109/embc.2012.6346864
复制
发表时间：
2012
期刊：
影响因子：
--
通讯作者：
Metaxas D
中科院分区：
文献类型：
--
作者：
Wang X;Mihalef V;Qian Z;Voros S;Metaxas D
在本文中，我们提出了一种利用高分辨率CT数据和标记MRI重建左心室（LV）心内膜运动的新方法。高分辨率CT数据提供左室心内膜表面的解剖细节，如乳头肌和心小梁。标记MRI提供更好的时间分辨率。这两种成像技术的结合可以更好地了解左心室的运动。采用均值移位法对高分辨率CT图像进行分割，生成左室心内膜网格。利用CT数据建立的高分辨率心内膜表面无网格变形模型与同阶段的标记MRI拟合。利用拉格朗日动力学和局部拉普拉斯变形计算心肌的三维变形。将左心室内表面分割图像与心脏内表面图像进行比较，结果吻合度较高。乳头肌以根状附着于内表面。左心室内表面的游离壁被小梁覆盖。在心脏周期的前半段，心脏壁和乳头肌的变形被提出。运动重建的结果与实时心脏视频非常接近。
In this paper we present a novel method for left ventricle (LV) endocardium motion reconstruction using high resolution CT data and tagged MRI. High resolution CT data provide anatomic details on the LV endocardial surface, such as the papillary muscle and trabeculae carneae. Tagged MRI provides better time resolution. The combination of these two imaging techniques can give us better understanding on left ventricle motion. The high resolution CT images are segmented with mean shift method and generate the LV endocardium mesh. The meshless deformable model built with high resolution endocardium surface from CT data fit to the tagged MRI of the same phase. 3D deformation of the myocardium is computed with the Lagrangian dynamics and local Laplacian deformation. The segmented inner surface of left ventricle is compared with the heart inner surface picture and show high agreement. The papillary muscles are attached to the inner surface with roots. The free wall of the left ventricle inner surface is covered with trabeculae carneae. The deformation of the heart wall and the papillary muscle in the first half of the cardiac cycle is presented. The motion reconstruction results are very close to the live heart video.