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首页> 外文期刊>Ultrasound in Medicine and Biology >On the IVUS plaque volume error in coronary arteries when neglecting curvature.
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On the IVUS plaque volume error in coronary arteries when neglecting curvature.

机译:忽略曲率时IVUS斑块在冠状动脉中的容积误差。

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摘要

Plaque volume determined by common linear 3-D IVUS analysis systems will show under- or overestimation in curved vessel segments because these systems approximate the true 3-D transducer pull-back trajectory by a straight line. We developed a mathematical model that showed that the error is primarily dependent on the curvature of the pull-back trajectory and not on vessel tortuosity. Furthermore, we measured this error in vivo in the coronary arteries of 15 patients, comparing the plaque volume using a true 3-D reconstruction method with that of the linear approach. The in vivo plaque volume error ranged from 2.3% to -1.2% for 15 coronary segments with lengths ranging from 38.8 to 89.1 mm (62.2 +/- 13 mm). The volume error introduced by linear 3-D IVUS analysis systems is dependent on the curvature of the pull-back trajectory. The error measured in vivo was small and inversely related to segment length.
机译:由常见的线性3-D IVUS分析系统确定的斑块体积将在弯曲的血管段中显示出低估或高估的情况,因为这些系统通过一条直线近似真实的3-D传感器后退轨迹。我们开发了一个数学模型,该模型表明误差主要取决于回弹轨迹的曲率,而不取决于船只的曲折度。此外,我们测量了15位患者在冠状动脉中的体内错误,并使用真正的3-D重建方法与线性方法比较了斑块体积。 15个冠状动脉节段的体内斑块体积误差为2.3%至-1.2%,长度范围为38.8至89.1mm(62.2 +/- 13mm)。线性3-D IVUS分析系统引入的体积误差取决于回弹轨迹的曲率。体内测得的误差很小,与节段长度成反比。

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