Two-dimensional spatial and temporal displacement and deformation field fitting from cardiac magnetic resonance tagging
Two-dimensional spatial and temporal displacement and deformation field fitting from cardiac magnetic resonance tagging
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DOI：
10.1016/s1361-8415(00)00018-9
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发表时间：
2000-09-01
影响因子：
10.9
通讯作者：
Magnin, IE
中科院分区：
文献类型：
--
作者：
Clarysse, P;Basset, C;Magnin, IE
标记磁共振成像是一种专门开发的无创评估心脏收缩功能的技术。已经开发了几种方法来从标记的图像数据估计心肌变形。虽然心肌运动是一种连续的物理现象，但这些方法中的大多数并没有明确地施加时间上的连续性约束。在本文中，我们提出了一个余弦系列模型拟合到整个标记数据集的时空心肌位移场建模。该方法已经在二维（2D）+时间中实现。它的准确性进行了连续评估实际标记的数据和模拟的二维（2D）移动心脏模型。仿真结果表明，0.1毫米的整体理论平均精度可以达到足够的模型阶数。标签模式的影响进行了评估，并提供计算时间作为模型复杂性和数据大小的函数。该方法提供了心肌内部的2D+时间变形的分析和分层模型。它被应用于实际标记的数据，从一个健康的受试者和缺血患者。结果表明，该模型的充分性，这种评价。(C)2000 Elsevier Science B.V.保留所有权利。
Tagged magnetic resonance imaging is a specially developed technique to noninvasively assess contractile function of the heart. Several methods have been developed to estimate myocardial deformation from tagged image data. Most of these methods do not explicitly impose a continuity constraint through time although myocardial motion is a continuous physical phenomenon. In this paper, we propose to model the spatio-temporal myocardial displacement field by a cosine series model fitted to the entire tagged dataset. The method has been implemented in two dimensions (2D)+time. Its accuracy was successively evaluated on actual tagged data and on a simulated two-dimensional (2D) moving heart model. The simulations show that an overall theoretical mean accuracy of 0.1 mm can be attained with adequate model orders. The influence of the tagging pattern was evaluated and computing time is provided as a function of the model complexity and data size. This method provides an analytical and hierarchical model of the 2D+time deformation inside the myocardium. It was applied to actual tagged data from a healthy subject and from a patient with ischemia. The results demonstrate the adequacy of the proposed model for this evaluation. (C) 2000 Elsevier Science B.V. All rights reserved.