NDLI: Phase aberration correction and motion compensation for ultrasonic hyperthermia phased arrays: experimental results

Content Provider	IEEE Xplore Digital Library
Author	Hong Wang Ebbini, E.S. O'Donnell, M. Cain, C.A.
Copyright Year	1986
Abstract	In ultrasound hyperthermia, focal patterns generated by phased arrays can be degraded by phase errors due to tissue inhomogeneities, digitization of the driving signals, and imperfect fabrication of the transducers. The degree of degradation depends on the severity of phase aberrations. As predicted by simulation and verified by experimental results, focal degradation scales with the circular variance of phase errors. However, degraded power deposition patterns can be significantly improved after phase aberration correction, especially where patterns are complicated and the aberrations are severe. Also, as shown in motion compensation experiments, an aberration corrected pattern can be particularly sensitive to aberrator movement greater than the correlation length of the aberrator. After motion compensation, new sharply focused patterns can be accomplished, thus reducing the unwanted influence of "body" movement by stabilizing the positions of foci with respect to patient anatomy.<>
Starting Page	34
Ending Page	43
Page Count	10
File Size	910377
File Format	PDF
ISSN	08853010
Volume Number	41
Issue Number	1
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1994-01-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Motion compensation Degradation Phased arrays Ultrasonic imaging Hyperthermia Signal generators Ultrasonic transducer arrays Fabrication Ultrasonic transducers Predictive models
Content Type	Text
Resource Type	Article
Subject	Acoustics and Ultrasonics Instrumentation Electrical and Electronic Engineering

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