Systems and methods for creating longer necrosed volumes using a phased array focused ultrasound system
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United States of America Patent
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Sep 2, 2003
Grant Date -
N/A
app pub date -
Apr 21, 2000
filing date -
Apr 21, 2000
priority date (Note) -
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Abstract
A system for performing a therapeutic procedure using focused ultrasound includes a transducer array including a plurality of transducer elements, drive circuitry coupled to the transducer elements, and a controller coupled to the drive circuitry. The controller controls the drive circuitry to alternatively provide sets of the transducer elements with respective drive signals. Each of the sets of transducer elements are alternatively driven with the respective drive signals for a predetermined duration during a sonication, while substantially continuously focusing ultrasonic energy produced by the transducer elements of each set at a desired focal zone. The controller also controls a phase component of the respective drive signals to provide a predetermined size, shape, and/or location of the focal zone, and thereby necrose a target tissue region at the focal zone.
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