1 May 1998 Efficient high-performance ultrasound beamforming using oversampling
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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.
© (1998) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Steven R. Freeman, Marshall K. Quick, Marc A. Morin, R. Carver Anderson, Charles S. Desilets, Thomas E. Linnenbrink, and Matthew O'Donnell "Efficient high-performance ultrasound beamforming using oversampling", Proc. SPIE 3341, Medical Imaging 1998: Ultrasonic Transducer Engineering, (1 May 1998); doi: 10.1117/12.308004; https://doi.org/10.1117/12.308004

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