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Please use this identifier to cite or link to this item: http://hdl.handle.net/1842/3724

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Title: Segmented Motion Compensation for Complementary Coded Ultrasonic Imaging
Authors: Cannon, Cormac
Hannah, John
McLaughlin, Steve
Issue Date: May-2010
Journal Title: IEEE Transactions On Ultrasonics Ferroelectrics and Frequency Control
Volume: 57
Issue: 5
Page Numbers: 1039-1050
Publisher: IEEE
Abstract: Ultrasonic imaging using complementary coded pulses offers the SNR improvements of signal coding without the filter side-lobes introduced by single-transmit codes. Tissue motion between coded pulse emissions, however, can introduce high side-lobes caused by misalignment of complementary filter outputs. This paper presents a method for filtering and motion compensation of complementary coded signals appropriate for use in medical imaging. The method is robust to the effects of non-ideal transducers on the imaging signals, includes mirrored compensation stages to reduce the impact of motion estimation error, and has been shown to reduce side-lobes to levels that compare favorably to systems using FM-coded signals of similar length and bandwidth while providing increased coding gain and range resolution. In addition, motion compensation allows the received data to be used without the frame-rate penalty usually incurred by complementary-coded imaging. The method has been verified using simulated point and speckle targets with both homogeneous and inhomogeneous motion profiles. Selected results have been verified experimentally.
Keywords: ultrasonic imaging
acoustic signal processing
biomedical ultrasonics
motion estimation
motion compensation
encoding
URI: http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=5456253&tag=1
http://hdl.handle.net/1842/3724
ISSN: 0885-3010
Appears in Collections:Engineering publications

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