Zhao D, Bohs L N, Trahey G E
Department of Biomedical Engineering, Duke University, Durham, NC 27706.
Ultrason Imaging. 1992 Apr;14(2):97-110. doi: 10.1177/016173469201400201.
Inhomogeneous acoustic velocity in human tissue introduces phase aberration in ultrasonic imaging systems and degrades image quality. A novel technique that employs echo signals from moving diffuse targets, such as flowing blood, as an image quality factor to compensate for phase aberration is described. Such signals can be obtained by subtracting the images of two consecutive target interrogations. The fundamental statistics of the quality factor and other related parameters are developed to provide a theoretical basis for the technique.
人体组织中不均匀的声速会在超声成像系统中引入相位畸变并降低图像质量。本文描述了一种新技术，该技术利用来自移动散射目标（如流动血液）的回波信号作为图像质量因子来补偿相位畸变。此类信号可通过减去两个连续目标询问的图像获得。推导了质量因子及其他相关参数的基本统计量，为该技术提供理论基础。
