Haberkorn U, Layer G, Rudat V, Zuna I, Lorenz A, van Kaick G
Institute of Radiology and Pathophysiology, Deutsches Krebsforschungszentrum, Heidelberg, Germany.
J Clin Ultrasound. 1993 Sep;21(7):423-9. doi: 10.1002/jcu.1870210704.
The influence of different examination conditions on the ultrasound B-scan was investigated using a tissue-mimicking phantom and a computerized ultrasound system. Several fat-muscle combinations simulated differences in abdominal wall thickness and composition. The analysis of the ultrasound images was performed by use of statistical parameters applied in ultrasound tissue characterization, thereby the influence of the abdominal wall thickness and composition on the ultrasound image brightness, microtexture, and macrotexture (image sharpness) was studied. An increasing fat path caused a decrease in ultrasound image brightness and microtexture. The macrotexture was largely unaffected. Muscle tissue alone had a weak influence on the microtexture parameters. Our results show that an increase in the fat layer of the abdominal wall causes a darker, unsharp image and may lead to false diagnoses, especially in adiposity. Furthermore, fat-muscle combinations caused a decrease in image brightness and contrast. The decrease in these image properties was dependent on the thickness of the combination as well as on the frequency of the transducer. The effects were stronger for high-frequency transducers.
使用组织模拟体模和计算机化超声系统研究了不同检查条件对超声B扫描的影响。几种脂肪-肌肉组合模拟了腹壁厚度和组成的差异。通过使用超声组织表征中应用的统计参数对超声图像进行分析，从而研究了腹壁厚度和组成对超声图像亮度、微观纹理和宏观纹理（图像清晰度）的影响。脂肪路径增加导致超声图像亮度和微观纹理降低。宏观纹理基本未受影响。单独的肌肉组织对微观纹理参数影响较弱。我们的结果表明，腹壁脂肪层增加会导致图像变暗、不清晰，并可能导致误诊，尤其是在肥胖患者中。此外，脂肪-肌肉组合会导致图像亮度和对比度降低。这些图像特性的降低取决于组合的厚度以及换能器的频率。高频换能器的影响更强。
