Rhyne T L, Sagar K B, Wann S L, Haasler G
Ultrason Imaging. 1986 Apr;8(2):107-20. doi: 10.1177/016173468600800203.
This paper studies the absolute myocardial backscatter as a function of the frequency and phase of the cardiac cycle. This was achieved by calibration of the ultrasonic instrumentation and the random diffraction process. We have discovered a first-order model in which the scattering from the myocardium is Rayleigh scattering with a cardiac cycle variation in the scattering cross section. Furthermore, the statistics are approximately those of a radio frequency waveform with two independent Gaussian components (Rayleigh envelope). Deviations from the first-order model suggest measurable fine structure related to myocardial ultrastructure. This model has profound effects on the choice of optimal radiation patterns and signal processing schemes for preparing diagnostic parameters (e.g., integrated backscatter).
本文研究了作为心动周期频率和相位函数的绝对心肌背向散射。这是通过超声仪器校准和随机衍射过程实现的。我们发现了一个一阶模型，其中心肌散射为瑞利散射，散射截面随心动周期变化。此外，统计数据近似于具有两个独立高斯分量（瑞利包络）的射频波形。与一阶模型的偏差表明存在与心肌超微结构相关的可测量精细结构。该模型对用于准备诊断参数（如积分背向散射）的最佳辐射模式和信号处理方案的选择具有深远影响。
