Wavenumber Beamforming With Sub-Nyquist Sampling for Focus-Beam Ultrasound Imaging

IF 3 2区 工程技术 Q1 ACOUSTICS
Hao Guo;Steven Freear;Guang-Quan Zhou
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引用次数: 0

Abstract

Conventional medical ultrasound systems utilizing focus-beam imaging generally acquire multichannel echoes at frequencies in tens of megahertz after each transmission, resulting in significant data volumes for digital beamforming. Furthermore, integrating state-of-the-art beamformers with transmission compounding substantially increases the beamforming complexity. Except for upgrading the hardware system for better computing performance, an alternative strategy for accelerating ultrasound data processing is the wavenumber beamforming algorithm, which has not been effectively extended to synthetic focus-beam transmission imaging. In this study, we propose a novel wavenumber beamforming algorithm to efficiently reduce the computational complexity of traditional focus-beam ultrasound imaging. We further integrate the wavenumber beamformer with a sub-Nyquist sampling framework, enabling ultrasonic systems to acquire echoes within the active bandwidth at significantly reduced rates. Simulation and experimental results indicate that the proposed beamformer offers image quality comparable to the state-of-the-art spatiotemporal beamformer while reducing the sampling rate and runtime by nearly ninefold and fourfold, respectively. The proposed approach would potentially help the development of low-power consumption and portable ultrasound systems.
用于聚焦超声波成像的亚奈奎斯特采样波束成形。
传统的医用超声系统利用聚焦波束成像,每次传输后通常都能获得频率为几十兆赫兹的多通道回波,这就为数字波束成形带来了巨大的数据量。此外,将最先进的波束成形器与传输复合集成,大大增加了波束成形的复杂性。除了升级硬件系统以提高计算性能外,加速超声数据处理的另一种策略是波束成形算法,但该算法尚未有效扩展到合成聚焦波束传输成像。在本研究中,我们提出了一种新型的波束成形算法,以有效降低传统聚焦光束超声成像的计算复杂度。我们进一步将波束成形器与亚奈奎斯特采样框架相结合,使超声系统能以显著降低的速率获取有效带宽内的回波。仿真和实验结果表明,所提出的波束成形器可提供与最先进的时空波束成形器相当的图像质量,同时将采样率和运行时间分别缩短了近九倍和四倍。所提出的方法可能有助于开发低功耗和便携式超声系统。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
CiteScore
7.70
自引率
16.70%
发文量
583
审稿时长
4.5 months
期刊介绍: IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control includes the theory, technology, materials, and applications relating to: (1) the generation, transmission, and detection of ultrasonic waves and related phenomena; (2) medical ultrasound, including hyperthermia, bioeffects, tissue characterization and imaging; (3) ferroelectric, piezoelectric, and piezomagnetic materials, including crystals, polycrystalline solids, films, polymers, and composites; (4) frequency control, timing and time distribution, including crystal oscillators and other means of classical frequency control, and atomic, molecular and laser frequency control standards. Areas of interest range from fundamental studies to the design and/or applications of devices and systems.
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