Ultrasonic medical apparatus
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United States of America Patent
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-
Apr 4, 1995
Grant Date -
N/A
app pub date -
Mar 15, 1994
filing date -
Mar 30, 1993
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An ultrasonic medical apparatus, particularly convenient for use inside a body cavity, includes an applicator having an ultrasonic transducer, which may be attached to an acoustic lens such that the emitted ultrasonic waves are focused at two or more different positions. For this purpose, the wave-emitting surface of the transducer, or the acoustic lens attached to it, is partitioned into concave surface elements which may be in a concentric annular arrangement and may each have a different radius of curvature and a different center of concavity. An apparatus thus structured can be made compact and hence is convenient for use inside a body cavity.
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