Surgery – Truss – Pad
Patent
1992-12-04
1994-05-03
Jaworski, Francis
Surgery
Truss
Pad
73631, A61B 800
Patent
active
053078152
ABSTRACT:
An ultrasound transducer apparatus for use with an ultrasound imaging system which includes signal transmission and signal receiving circuitry coupled to the transducer through a cable. The transducer apparatus includes a transducer for converting ultrasonic energy into electronic signals and a variable gain amplifier circuit having an input coupled to the transducer and an output coupled to the cable for amplifying the electronic signals at a gain determined by a gain control signal from the imaging system. The transducer apparatus is typically hand-held, and the variable gain amplifier circuit is preferably mounted in the hand-held unit in close proximity to the transducer element. The variable gain amplifier circuit preferably includes a preamplifier and a variable gain amplifier. Preferably, the transducer is a transducer array including a plurality of transducer elements, each having a preamplifier and a variable gain amplifier associated with it.
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Gatzke, R. D. et al., Electronic Scanner for a Phased-Array Ultrasound Transducer, Hewlett-Packard Journal, Dec. 1983, pp. 13-19.
Jundanian, R. H. et al., Control Hardware for an Ultrasound Imaging System Hewlett-Packard Journal, Dec. 1983, pp. 3-5.
Anthony Michael P.
Gatzke Ronald D.
Hewlett--Packard Company
Jaworski Francis
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