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Estimation of regional myocardial mass at risk based on distal arterial lumen volume and length using 3D micro-CT images

机译：使用3D micro-CT图像根据远端动脉腔体积和长度估算有风险的局部心肌质量

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The determination of regional myocardial mass at risk distal to a coronary occlusion provides valuable prognostic information for a patient with coronary artery disease. The coronary arterial system follows a design rule which allows for the use of arterial branch length and lumen volume to estimate regional myocardial mass at risk. Image processing techniques, such as segmentation, skeletonization, and arterial network tracking, are presented for extracting anatomical details of the coronary arterial system using micro-computed tomography (CT). Moreover, a method of assigning tissue voxels to their corresponding arterial branches is presented to determine the dependent myocardial region. The proposed micro-CT technique was utilized to investigate the relationship between the sum of the distal coronary arterial branch lengths and volumes to the dependent regional myocardial mass using a polymer cast of a porcine heart. The correlations of the logarithm of the total distal arterial lengths (L) to the logarithm of the regional myocardial mass (M) for the left anterior descending (LAD), left circumflex (LCX) and right coronary (RCA) arteries were log(L) = 0.73log(M)+ 0.09 (R= 0.78), log(L) = 0.82log(M)+ 0.05 (R= 0.77), and log(L) = 0.85log(M)+ 0.05 (R= 0.87)s, respectively. The correlation of the logarithm of the total distal arterial lumen volumes (V) to the logarithm of the regional myocardial mass for the LAD, LCX and RCA were log(V) = 0.93log(M)− 1.65 (R= 0.81), log(V) = 1.02log(M) −1.79 (R= 0.78), and log(V) = 1.17log(M)− 2.10 (R= 0.82), respectively. These morphological relations did not change appreciably for diameter truncations of 600 to 1400 µm. The results indicate that the image processing procedures successfully extracted information from a large 3D dataset of the coronary arterial tree to provide prognostic indications in the form of arterial tree parameters and anatomical area at risk.
机译：确定冠状动脉闭塞远端有危险的局部心肌块为冠心病患者提供了有价值的预后信息。冠状动脉系统遵循设计规则，该规则允许使用动脉分支长度和管腔体积来估计有风险的局部心肌质量。提出了图像处理技术，例如分割，骨架化和动脉网络跟踪，用于使用微计算机断层扫描（CT）提取冠状动脉系统的解剖学细节。此外，提出了一种将组织体素分配给它们相应的动脉分支的方法，以确定相关的心肌区域。利用猪心脏的聚合物浇铸技术，利用拟议的微型CT技术研究了远端冠状动脉分支长度总和与体积与依存区域心肌质量之间的关系。左前降支（LAD），左旋支（LCX）和右冠状动脉（RCA）的总远端动脉长度（L）的对数与区域心肌重量（M）的对数之间的相关性为log（L） ）= 0.73log（M）+ 0.09（R = 0.78），log（L）= 0.82log（M）+ 0.05（R = 0.77），log（L）= 0.85log（M）+ 0.05（R = 0.87） ）。 LAD，LCX和RCA的总远端动脉腔体积（V）的对数与区域心肌质量的对数的相关性为log（V）= 0.93log（M）-1.65（R = 0.81），log （V）= 1.02log（M）−1.79（ R = 0.78），log（ V ）= 1.17log（ M ）- 2.10（ R = 0.82）。对于600至1400 µm的截断直径，这些形态关系没有明显变化。结果表明，图像处理程序已成功地从冠状动脉树的大型3D数据集中提取了信息，以动脉树参数和处于危险中的解剖区域的形式提供了预后指示。

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