Yuan W Q, Johnson S A, Berggren M J, Eidens R S
Department of Electrical Engineering, University of Utah, Salt Lake City 84112.
Ultrason Imaging. 1988 Oct;10(4):287-97. doi: 10.1177/016173468801000405.
A brief review of the synthetic focusing method is given. The theoretical limit of resolution that may be achieved with the synthetic focusing methods is demonstrated using experimental results on a thin thread obtained with an annular array whose design was given in Part I. The advantage of large aperture arrays is illustrated by an in vitro reflection image of a dog artery, made with this array, that has at least four times the spatial resolution of present clinical B-scanners operating in the same frequency range.
本文简要回顾了合成聚焦方法。利用第一部分给出设计的环形阵列对细线进行实验所获结果，证明了合成聚焦方法可能达到的理论分辨率极限。通过用该阵列获得的犬动脉体外反射图像，说明了大孔径阵列的优势，该图像的空间分辨率至少是在相同频率范围内工作的现有临床B扫描仪的四倍。
