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Proceedings Paper

Efficient high-performance ultrasound beamforming using oversampling
Author(s): Steven R. Freeman; Marshall K. Quick; Marc A. Morin; R. Carver Anderson; Charles S. Desilets; Thomas E. Linnenbrink; Matthew O'Donnell
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Paper Abstract

High-performance and efficient beamforming circuitry is very important in large channel count clinical ultrasound systems. Current state-of-the-art digital systems using multi-bit analog to digital converters (A/Ds) have matured to provide exquisite image quality with moderate levels of integration. A simplified oversampling beamforming architecture has been proposed that may a low integration of delta-sigma A/Ds onto the same chip as digital delay and processing circuitry to form a monolithic ultrasound beamformer. Such a beamformer may enable low-power handheld scanners for high-end systems with very large channel count arrays. This paper presents an oversampling beamformer architecture that generates high-quality images using very simple; digitization, delay, and summing circuits. Additional performance may be obtained with this oversampled system for narrow bandwidth excitations by mixing the RF signal down in frequency to a range where the electronic signal to nose ratio of the delta-sigma A/D is optimized. An oversampled transmit beamformer uses the same delay circuits as receive and eliminates the need for separate transmit function generators.

Paper Details

Date Published: 1 May 1998
PDF: 8 pages
Proc. SPIE 3341, Medical Imaging 1998: Ultrasonic Transducer Engineering, (1 May 1998); doi: 10.1117/12.308004
Show Author Affiliations
Steven R. Freeman, Univ. of Michigan (United States)
Marshall K. Quick, Q-DOT, Inc. (United States)
Marc A. Morin, Q-DOT, Inc. (United States)
R. Carver Anderson, Ultrex Corp. (United States)
Charles S. Desilets, Ultrex Corp. (United States)
Thomas E. Linnenbrink, Q-DOT, Inc. (United States)
Matthew O'Donnell, Univ. of Michigan (United States)

Published in SPIE Proceedings Vol. 3341:
Medical Imaging 1998: Ultrasonic Transducer Engineering
K. Kirk Shung, Editor(s)

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