Electronically-controlled variable focus ultrasound hyperthermia system
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United States of America Patent
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Jul 3, 1990
Grant Date -
N/A
app pub date -
Jun 21, 1988
filing date -
Jun 21, 1988
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A therapeutic ultrasound hyperthermia system utilizes a phased array of ultrasound transducer elements. By varying the phase delays in the excitation of individual transducer elements, the focal depth of the ultrasonic beam can be varied, without changing the distance between the transducer and the patient. The phased array of transducer elements can be an array of rectangular elements which are rotated about an axis to deliver ultrasound to the target region while minimizing overall heating effect in the treatment areas outside the target region.
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