Physical factors influencing quantitation of two-dimensional contrast echo amplitudes.
Physical factors influencing quantitation of two-dimensional contrast echo amplitudes.
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影响二维对比回波幅度定量的物理因素。
DOI：
10.1016/s0735-1097(84)80334-4
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发表时间：
1984
影响因子：
24
通讯作者：
Meerbaum,S
中科院分区：
文献类型：
--
作者：
Zwehl,W;Areeda,J;Schwartz,G;Feinstein,S;Ong,K;Meerbaum,S
在一个简化的体外模型中检查了可能干扰新的心肌造影二维超声心动图技术定量的测量误差，该模型由50 cc血液填充球囊组成，并补充控制注射0.2至2.6 cc超声处理葡萄糖70%。用二维超声心动图对球囊体积中的血液造影剂混合物进行成像，并研究离散区域的回声强度的幅度和时间过程。初步证据表明，区域造影剂回波强度测量值会因介入区域中的造影剂相关超声衰减以及造影剂注射量和方式而发生显著变化。因此，注射1.2 cc造影剂比注射0.8或0.6 cc造影剂产生更高的峰值回波强度和更快的衰减。还发现这些测量结果受到回波描记系统信号处理和时间增益补偿的影响，这导致回波幅度的非线性和不均匀补偿图像分布。其他因素进行了讨论，包括传感器相关的图像分辨率和图像纹理，造影剂气泡的大小和持久性和计算机方法的标准化选择区域的利益和分析的区域对比强度衰减曲线。
Measurement errors that may interfere with quantitation by the new myocardial contrast two-dimensional echocardiographic technique were examined in a simplified in vitro model consisting of a 50 cc blood-filled balloon with supplemental controlled injection of 0.2 to 2.6 cc of sonicated dextrose 70%. The blood-contrast mixture in the balloon volume was imaged with two-dimensional echocardiography and discrete regions were studied for both magnitude and time course of echo intensities. Preliminary evidence indicates that a regional contrast echo intensity measurement is significantly modified by contrast-related ultrasound attenuation in intervening regions and by the amount and mode of contrast material injection. Thus, injection of 1.2 cc contrast material resulted in substantially higher peak echo intensity and a more rapid decay than injection of 0.8 or 0.6 cc. These measurements were also found to be influenced by the echographic system signal processing and time-gain compensation which contribute to nonlinear and unevenly compensated image distribution of echo amplitudes. Other factors are discussed, including transducer-related image resolution and image texture, contrast agent bubble size and persistence and computer methods for standardized selection of region of interest and analysis of the regional contrast intensity decay curve.
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影响因子：
--
作者：
T. Kobayashi;M. Hayashi;M. Arai
通讯作者：
M. Arai
影响因子：
6.7
作者：
H. Melton;D. Skorton
通讯作者：
D. Skorton
超声换能器性能无法通过临床图像进行评估。
DOI：
10.2214/ajr.137.6.1239
发表时间：
1981
期刊：
AJR. American journal of roentgenology
影响因子：
--
作者：
C. Jaffe;D. J. Harris;K. Taylor;G. Viscomi;E. Mannes
通讯作者：
E. Mannes
超声心动图计算。
影响因子：
9.1
作者：
R. B. Sinclair;P. Oldershaw;D. Gibson
通讯作者：
D. Gibson
粒子图像分辨率测试对象。
影响因子：
2.3
作者：
A. Goldstein;W. Clayman
通讯作者：
W. Clayman