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首页> 外文期刊>IEEE Transactions on Medical Imaging >A model-based four-dimensional left ventricular surface detector
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A model-based four-dimensional left ventricular surface detector

机译:基于模型的三维左心室表面检测器

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摘要

The authors have developed a general model-based surface detector for finding the four-dimensional (three spatial dimensions plus time) endocardial and epicardial left ventricular boundaries. The model encoded left ventricular (LV) shape, smoothness, and connectivity into the compatibility coefficients of a relaxation labeling algorithm. This surface detection method was applied to gated single photon emission computed tomography (SPECT) perfusion images, tomographic radionuclide ventriculograms, and cardiac rotation magnetic resonance images. Its accuracy was investigated using actual patient data. Global left ventricular volumes correlated well, with a maximum correlation coefficient of 0.98 for magnetic resonance imaging (MRI) endocardial surfaces and a minimum of 0.88 for SPECT epicardial surfaces. The average absolute errors of edge detection were 6.4, 5.6. and 4.6 mm for tomographic radionuclide ventriculograms, gated perfusion SPECT, and magnetic resonance images, respectively.
机译:作者开发了一种基于模型的通用表面检测器,用于查找心内膜和心外膜左心室边界的四维(三个空间维度加上时间)。该模型将左心室(LV)的形状,平滑度和连通性编码为松弛标记算法的相容性系数。这种表面检测方法已应用于门控单光子发射计算机断层扫描(SPECT)灌注图像,断层摄影的放射性核素心室图和心脏旋转磁共振图像。使用实际患者数据调查了其准确性。总体左心室容积相关性很好,磁共振成像(MRI)心内膜表面的最大相关系数为0.98,而SPECT心外膜表面的最小相关系数为0.88。边缘检测的平均绝对误差为6.4、5.6。层析X射线核素心室图,门控灌注SPECT和磁共振图像分别为4.6毫米和4.6毫米。

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