Effects of myocardial fiber orientation in echocardiography: Quantitative measurements and computer simulation of the regional dependence of backscattered ultrasound in the parasternal short-axis view
Effects of myocardial fiber orientation in echocardiography: Quantitative measurements and computer simulation of the regional dependence of backscattered ultrasound in the parasternal short-axis view
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DOI：
10.1016/s0894-7317(98)70134-8
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发表时间：
1998-10-01
影响因子：
6.5
通讯作者：
Miller, JG
中科院分区：
文献类型：
--
作者：
Holland, MR;Wilkenshoff, UM;Miller, JG
我们通过获得10名健康受试者的背向散射积分图像并在18个不同位置放置感兴趣区域来测量背向散射超声中的区域差异。在已有心肌各向异性超声特性测量值的基础上，建立了模拟短轴切面的计算机模型。测量结果显示，前间隔的背向散射值最大，侧壁减少了15.9+/-3.5分贝，下间隔减少了17.7+/-3.5分贝。后壁的值比前间隔的值低8.1+/-3.8分贝。模拟所预测的背向散射的区域变化与临床测量结果吻合较好。这些结果表明，基于背向散射测量的分析可能需要补偿心肌固有的各向异性属性。
We measured the regional disparity in backscattered ultrasound by means of obtaining integrated backscatter images of 10 healthy subjects and placing a region of interest in 18 distinct positions. A computer model simulating the short-axis view was implemented on the basis of previously measured values for the anisotropic ultrasonic properties of myocardium. Measurements showed that the integrated backscatter value was greatest for the anterior septum and decreased by 15.9 +/- 3.5 db for the lateral wall and 17.7 +/- 3.5 db for the inferior septum. The value in the posterior wall was 8.1 +/- 3.8 dB below the value for the anterior septum. The regional variation of backscatter predicted with the simulation correlated well with the clinical measurements. These results suggested that analyses based on measurements of backscatter may require compensation for the inherent anisotropic properties of myocardium.