NDLI: A phased array antenna for simultaneous thermotherapy and sonography

Content Provider	IEEE Xplore Digital Library
Author	Sheuaskov, T. Lerch, R. Fuchs, A. Schatzle, U.
Copyright Year	1997
Description	Author affiliation: Inst. of Meas. Technol., Johannes Kepler Univ., Linz, Austria (Sheuaskov, T.)
Abstract	The application of ultrasound for therapeutical treatment necessitates the control of the surgery process by means of an imaging system. A new type of linear phased array antenna, which is capable to generate high power therapy sound and also exhibits a pulse echo mode for imaging, was presented previously (T. Sheljaskov et al., 1996). Meanwhile, utilizing finite element simulations, boundary element simulations and experiments on prototypes, this concept could be improved in respect to the power transfer efficiency in therapy mode and the pulse shape in sonography mode. The novel antenna consists of three sectors: two of them are used only for producing 1.7 MHz sine burst therapy ultrasound, and the third is used for both, 5.1 MHz pulse-echo imaging as well as generating therapy ultrasound. The multifunctional elements of this sector cause 1.4 dB sine burst intensity loss compared to the pure therapy elements of the other sectors, as well as 7.3 /spl lambda/ pulse length, corresponding to -20 dB ringdown time.
Starting Page	1701
Ending Page	1704
File Size	304336
Page Count	4
File Format	PDF
ISBN	0780341538
ISSN	10510117
DOI	10.1109/ULTSYM.1997.663338
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	Phased arrays Antenna arrays Medical treatment Ultrasonic imaging Linear antenna arrays Pulse generation Control systems Surgery Power generation Acoustic imaging
Content Type	Text
Resource Type	Article

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