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Sampling-point-wise digital dynamic focusing in the receive mode of an ultrasonic linear array imaging system

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An ultrasonic linear array system has been developed in which dynamic focusing in the receive mode is performed in a digital fashion at every sampling point. In order to reduce the sampling rate, the analytic signal sampling technique is employed and the required Hilbert transformer is realized by analog 90° phase shifters. An ASIC chip for digital focusing which includes variable sampling clock generators and digital delay devices and adders, has been developed. The experimental results show a proper operation of the system

Published in:

Ultrasonics Symposium, 1993. Proceedings., IEEE 1993

Date of Conference:

31 Oct-3 Nov 1993