Article
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Preserved in Portico This version is not peer-reviewed
A 48-Channel High-Resolution Ultrasound Beamforming System for Ultrasound Endoscopy Applications
Version 1
: Received: 21 December 2023 / Approved: 21 December 2023 / Online: 22 December 2023 (04:52:04 CET)
A peer-reviewed article of this Preprint also exists.
Yun, S.; Lee, S.; Bae, J. A 48-Channel High-Resolution Ultrasound Beamforming System for Ultrasound Endoscopy Applications. Electronics 2024, 13, 568. Yun, S.; Lee, S.; Bae, J. A 48-Channel High-Resolution Ultrasound Beamforming System for Ultrasound Endoscopy Applications. Electronics 2024, 13, 568.
Abstract
We are introducing a highly efficient 48-channel ultrasound beamforming system ideal for ultrasound endoscopy applications. The system includes a transmitter and a receiver, which allow for low-area, high-resolution imaging acquisition. The transmitter uses a charge redistribution HV (high voltage) scheme to generate three-level pulses that actuate the transducer, implemented with the standard CMOS process for optimal cost and power savings. Meanwhile, the receiver features a sub-array structure and a delay generator that reduces area usage. To achieve high-resolution ultrasound imaging acquisition with low computational power, we developed the Shift Coherence Factor (SCF) algorithm, which is hardware-friendly. This approach delivers a lateral resolution over 20% better than the conventional delay and sum (DAS) algorithm, with a contrast ratio of over 30 dB. The system was implemented in a 180 nm standard CMOS process with an area of 24.98 mm2, power consumption of 8.23 mW per channel, achieving a delay resolution of 8.33 ns, and a low-area implementation of 0.52 mm2 per channel. The system offers high-quality imaging acquisition with minimal additional area and power consumption, which has great potential for 3D imaging or catheterized ultrasound systems.
Keywords
ultrasound beamforming; high-resolution image; digital beamformer; sub-array, delay generator; coherence factor; charge-redistribution HV pulser
Subject
Engineering, Electrical and Electronic Engineering
Copyright: This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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