3D left ventricular strain by phase unwrapping: A simulated annealing based branch-cut placement method
3D left ventricular strain by phase unwrapping: A simulated annealing based branch-cut placement method
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通过相位展开进行 3D 左心室应变：基于模拟退火的分支切割放置方法
DOI：
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发表时间：
2009
期刊：
影响因子：
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通讯作者：
L. Dell’Italia
中科院分区：
文献类型：
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作者：
B. Ambale;T. Denney;H. Gupta;S. Lloyd;L. Dell’Italia
本文提出了一种自动方法，用于根据标记心脏磁共振成像得出的相位展开谐波相位 (HARP) 图像测量每个成像时间帧中的 3D 左心室 (LV) 应变。在之前的工作中，在展开 HARP 图像之前，使用手动放置的分支切割来解决 HARP 图像中的相位不一致问题。本文提出了一种基于模拟退火的在短轴图像中放置分支切割的自动化方法，以及基于时间相位一致性的新成本函数。该方法显着减少了在每个成像时间帧内计算整个 LV 中的 3D 应变图所需的用户交互量。通过将展开相衍生的菌株与之前发布的基于特征的技术和之前发布的手动分支切割放置的展开相技术估计的菌株进行比较，在一组 40 项人体研究中验证了展开相衍生菌株。
This paper presents an automated method for measuring 3D left ventricular (LV) strain in each imaged time frame from phase unwrapped harmonic phase (HARP) images derived from tagged cardiac magnetic resonance imaging. In previous work, manuallyplaced branch cuts were used to resolve phase inconsistencies in HARP images before they were unwrapped. This paper presents an automated method for placing branch cuts in short-axis images based on simulated annealing with a new cost function based on temporal phase consistency. This method significantly reduces the amount of user interaction needed to compute 3D strain maps in the entire LV in each imaged time frame. The unwrapped-phase-derived strains were validated on a set of 40 human studies by comparing them to strains estimated by a previously published feature based technique and a previously published unwrapped-phase technique with manual branch cut placement.