PMID: 16529105Mar 15, 2006Paper

High-frequency ultrasound annular array imaging. Part II: digital beamformer design and imaging

IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
Changhong HuK Kirk Shung

Abstract

This is the second part of a two-paper series reporting a recent effort in the development of a high-frequency annular array ultrasound imaging system. In this paper an imaging system composed of a six-element, 43 MHz annular array transducer, a six-channel analog front-end, a field programmable gate array (FPGA)-based beamformer, and a digital signal processor (DSP) microprocessor-based scan converter will be described. A computer is used as the interface for image display. The beamformer that applies delays to the echoes for each channel is implemented with the strategy of combining the coarse and fine delays. The coarse delays that are integer multiples of the clock periods are achieved by using a first-in-first-out (FIFO) structure, and the fine delays are obtained with a fractional delay (FD) filter. Using this principle, dynamic receiving focusing is achieved. The image from a wire phantom obtained with the imaging system was compared to that from a prototype ultrasonic backscatter microscope with a 45 MHz single-element transducer. The improved lateral resolution and depth of field from the wire phantom image were observed. Images from an excised rabbit eye sample also were obtained, and fine anatomical structures were d...Continue Reading

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Citations

Dec 17, 2009·Medical & Biological Engineering & Computing·Khaldon LweesyMohammad Sameer
Jan 5, 2013·IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control·Weibao QiuLei Sun
Jul 26, 2012·IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control·Weibao QiuLei Sun
Aug 18, 2012·IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control·Jeffrey A Ketterling, Erwan Filoux
Dec 1, 2011·IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control·Hojong ChoiK Kirk Shung
Jul 16, 2013·IEEE Transactions on Biomedical Circuits and Systems·Gokce GurunF Levent Degertekin
Aug 19, 2009·IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control·Philippe Levesque, Mohamad Sawan
Feb 14, 2009·IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control·Sven Peter NäsholmBjørn A J Angelsen
May 26, 2007·IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control·Jeong ChoTai-Kyong Song
Nov 7, 2008·IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control·Chang-hong HuK Kirk Shung
Mar 15, 2014·Ultrasonic Imaging·Hojong ChoiK Kirk Shung
Mar 31, 2010·Proceedings of the Institution of Mechanical Engineers. Part H, Journal of Engineering in Medicine·M VogtH Ermert

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