NDLI: DC-biased electrostrictive materials and transducers for medical imaging

Content Provider	IEEE Xplore Digital Library
Author	Chen, J. Gururaja, T.R.
Copyright Year	1997
Description	Author affiliation: Hewlett-Packard Co., Andover, MA, USA (Chen, J.)
Abstract	The field-induced electromechanical properties of several electrostrictive materials have been studied for ultrasonic transducer applications. This paper reviews the most important material properties and summarizes the advantages of using electrostrictive materials in medical imaging applications. By controlling electrostrictive material properties, transducers can be operated over a broad temperature range with minimum variation of sensitivity (within 3dB over the operating temperature range). Electrostrictive transducers with either 2 or 4 elevation aperture groups have been built and the results demonstrate the benefits of using electrostrictive tuning capability to achieve elevation aperture control and apodization. A novel type of f/sub 0//2f/sub 0/ switchable transducer in which the operating frequency can be switched between two separated frequency bands expands the usable frequency range to over 100% -6dB bandwidth.
Starting Page	1651
Ending Page	1658
File Size	427887
Page Count	8
File Format	PDF
ISBN	0780341538
ISSN	10510117
DOI	10.1109/ULTSYM.1997.663311
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	Electrostriction Biomedical transducers Ultrasonic transducers Frequency Biomedical imaging Material properties Temperature distribution Temperature sensors Apertures Temperature control
Content Type	Text
Resource Type	Article

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