RANGE-DEPENDENT AND AZIMUTH-DEPENDENT VARIABILITY OF IMAGE TEXTURE IN TWO-DIMENSIONAL ECHOCARDIOGRAMS
RANGE-DEPENDENT AND AZIMUTH-DEPENDENT VARIABILITY OF IMAGE TEXTURE IN TWO-DIMENSIONAL ECHOCARDIOGRAMS
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DOI：
10.1161/01.cir.68.4.834
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发表时间：
1983-01-01
期刊：
影响因子：
37.8
通讯作者：
MELTON, HE
中科院分区：
文献类型：
--
作者：
SKORTON, DJ;COLLINS, SM;MELTON, HE
区域二维（2D）超声心动图振幅模式或图像纹理可能具有诊断重要性。超声心动图图像纹理部分是由于声学散斑，一种来自组织中许多小散射体的反射干涉的复杂图案。局部散斑图在与心肌结构异常相关的几种疾病中似乎发生了改变，但也可能因扫描仪器的各种特征而改变。区域2D超声心动图图像纹理的定量测量作为视场内的范围和方位角中的位置的函数而明显变化，即使在对散射体的均匀集合成像时也是如此。通过使用2台相控阵扫描仪和2种不同的数字化方法对组织等效体模进行成像，对该假设进行了测试。分析了在距离和方位角上分离的几个感兴趣区域中的纹理，发现定量纹理测量作为扇形视场中感兴趣区域的位置的函数的显著差异（通过多变量方差分析，P值0.006-0.0001）。两种扫描仪和两种数字化方法都发现了纹理的显著区域差异。区域定量图像纹理在2D超声心动图明显变化的范围和方位角的函数，即使是在成像的散射体的均匀合奏。变异性与几种物理和仪器相关现象有关，并排除了将所有区域纹理改变解释为指示组织结构异常。
Regional 2-dimensional (2D) echocardiographic amplitude patterns, or image texture, may be of diagnostic importance. Echocardiographic image texture is due in part to acoustic speckle, a complex pattern of interference of reflections from many small scatterers in tissue. The regional speckle pattern appears to be altered in several disorders associated with abnormalities in myocardial structure [in humans] but also may be altered by a variety of characteristics of the scanning instrument. Quantitative measures of regional 2D echocardiographic image texture evidently vary as a function of position in range and azimuth within the field of view, even when imaging a uniform ensemble of scatterers. This hypothesis was tested by imaging a tissue-equivalent phantom with 2 phased-array scanners and 2 different methods of digitization. The texture in several regions of interest separated in range and azimuth was analyzed and significant differences in quantitative texture measures as a function of position of the region of interest in the sector field of view were found (P values 0.006-0.0001 by multivariate analysis of variance). Significant regional variability in texture were found with both scanners and both methods of digitization. Regional quantitative image texture in 2D echocardiograms evidently varies as a function of range and azimuth, even when imaging a uniform ensemble of scatterers. The variability is related to several physical and instrument-related phenomena and precludes interpreting all regional texture alterations as indicating tissue structural abnormalities.