23 December 1976 An Opto-Electronic Alternative to Programmable Digital Time-Delay Functions in High Resolution Synthetic-Aperture Ultrasound Equipment
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Proceedings Volume 0096, Application of Optical Instrumentation in Medicine V; (1976) https://doi.org/10.1117/12.965432
Event: Application of Optical Instrumentation in Medicine V, 1976, Washington, D.C., United States
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.
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Terrance Matzuk, Terrance Matzuk, "An Opto-Electronic Alternative to Programmable Digital Time-Delay Functions in High Resolution Synthetic-Aperture Ultrasound Equipment", Proc. SPIE 0096, Application of Optical Instrumentation in Medicine V, (23 December 1976); doi: 10.1117/12.965432; https://doi.org/10.1117/12.965432
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