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Proceedings Paper

An Opto-Electronic Alternative To Programmable Digital Time-Delay Functions In High Resolution Synthetic-Aperture Ultrasound Equipment
Author(s): Terrance Matzuk
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Paper Abstract

In the synthetic-aperture method of acoustical imaging, reflections are processed to achieve resolution improvements expected from transducers larger than commonly used in diagnostic ultrasonography. Since in practice transducers cannot exceed about 3 cm in diameter, electronic aperturing simulates a larger transducer with increased azimuthal resolution. All depths in the field of view are equally in focus, eliminating beam divergence. This inexpensive system functions in real time, providing immediately displayed high-resolution B-scans. A single-channel transducer is rapidly driven by novel mechanical means achieving high frame rates and high transducer position densities without costs and complexities of transducer arrays. Data acquisition, processing, and display occur on line, eliminating much memory storage and programmable time-delay functions typical of synthetic aperture systems. Novel optical-electronic computational methods are utilized. Range and azimuthal resolutions of stationary and moving phantoms are compared for identical insonifying frequencies against conventional diagnostic B-scanners.

Paper Details

Date Published: 23 December 1976
PDF: 5 pages
Proc. SPIE 0096, Application of Optical Instrumentation in Medicine V, (23 December 1976); doi: 10.1117/12.965432
Show Author Affiliations
Terrance Matzuk, University of Pittsburgh School of Medicine (United States)

Published in SPIE Proceedings Vol. 0096:
Application of Optical Instrumentation in Medicine V
Robert K. Cacak; Paul L. Carson; Gregory Dubuque; Joel E. Gray; William R. Hendee; Raymond P. Rossi; Arthur Haus, Editor(s)

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