NDLI: Wavefront distortion measurements in the human breast

Content Provider	IEEE Xplore Digital Library
Author	Gauss, R.C. Soo, M.S. Trahey, G.E.
Copyright Year	1997
Description	Author affiliation: Dept. of Biomed. Eng., Duke Univ., Durham, NC, USA (Gauss, R.C.)
Abstract	Published wavefront distortion (phase aberration) measurements for the human breast ranged from mild phase aberrations (8 ns r.m.s) to severe phase aberrations (67 ns r.m.s.). These measurements are required to specify arrays and assess the potentials of adaptive imaging. They require high inter-element uniformity so that receive signal variations between elements can be attributed to wave propagation effects. Array elements must be small to minimize the integration of the arriving wavefront across the face of the element. The authors have developed an apparatus to make concurrent pulse-echo and pitch-catch measurements in a clinical setting. The breast is stabilized between opposing transducers with light compression. After fixing the position of the transducers, pulse-echo and pitch-catch snapshots are captured sequentially with tissue and reference phantom targets. Data was collected from the left breast in twelve volunteers. Phase errors were significantly smaller for pulse-echo measurements (mean 25 ns r.m.s.) than for pitch-catch measurements (mean 55 ns r.m.s.).
Starting Page	1547
Ending Page	1551
File Size	290603
Page Count	5
File Format	PDF
ISBN	0780341538
ISSN	10510117
DOI	10.1109/ULTSYM.1997.663290
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1997-10-05
Publisher Place	Canada
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Distortion measurement Humans Breast Pulse measurements Phase measurement Transducers Phase distortion Anthropometry Adaptive arrays Optical propagation
Content Type	Text
Resource Type	Article

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