Constrained thin-plate spline reconstruction of 2D deformations from tagged MRI

A. Amini, Yasheng Chen, J. Sun, V. Mani
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引用次数: 1

Abstract

Efficient constrained thin-plate spline warps are proposed in this paper which can warp an area in the plane such that two embedded snake grids obtained from two SPAMM frames are brought into registration, interpolating a dense displacement vector field. The reconstructed vector-field adheres to the known displacement information at the intersections, forces corresponding snakes to be warped into one another, and for all other points in the myocardium, where no information is available, a C/sup 1/ continuous vector field is interpolated. The formalism proposed in this paper improves on the authors' previous variational-based implementation and generalizes warp methods to include biologically relevant contiguous open curves, in addition to standard landmark points. The method has been extensively validated with a cardiac motion simulator, in addition to in-vivo tagging data sets.
标记MRI二维变形的约束薄板样条重建
本文提出了一种有效的约束薄板样条扭曲方法,该方法可以扭曲平面上的一个区域,从而将两个SPAMM帧得到的两个嵌入的蛇形网格进行配准,插值出一个密集的位移向量场。重建的向量场依附于已知的交点位移信息,迫使相应的蛇形相互扭曲,对于心肌中所有其他没有信息的点,插值一个C/sup 1/连续向量场。本文提出的形式主义改进了作者之前基于变分的实现,并将warp方法推广到包括生物相关的连续开放曲线,以及标准地标点。除了体内标记数据集外,该方法已通过心脏运动模拟器进行了广泛验证。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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