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首页> 外文期刊>Medical image analysis >Four-dimensional processing of deformable cardiac PET data.
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Four-dimensional processing of deformable cardiac PET data.

机译:可变形心脏PET数据的四维处理。

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摘要

A four-dimensional deformable motion algorithm is described for use in the motion compensation of gated cardiac positron emission tomography. The algorithm makes use of temporal continuity and a non-uniform elastic material model to provide improved estimates of heart motion between time frames. Temporal continuity is utilized in two ways. First, incremental motion fields between adjacent time frames are calculated to improve estimation of long-range motion between distant time frames. Second, a consistency criterion is used to insure that the image match between distant time frames is consistent with the deformations used to match adjacent time frames. The consistency requirement augments the algorithm's ability to estimate motion between noisy time frames, and the concatenated incremental motion fields improve estimation for large deformations. The estimated motion fields are used to establish a voxel correspondence between volumes and to produce a motion-compensated composite volume.
机译:描述了一种四维可变形运动算法,用于门控心脏正电子发射断层扫描的运动补偿。该算法利用时间连续性和非均匀弹性材料模型来提供时间帧之间心脏运动的改进估计。时间连续性有两种使用方式。首先,计算相邻时间帧之间的增量运动场,以改善对远程时间帧之间的远距离运动的估计。其次,使用一致性标准来确保遥远时间帧之间的图像匹配与用于匹配相邻时间帧的变形一致。一致性要求增强了算法估计嘈杂时间帧之间运动的能力,并且级联的增量运动场改善了对大变形的估计。估计的运动场用于在体积之间建立体素对应关系,并产生运动补偿的复合体积。

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