Acoustic-Feedback Power Control During Focused Ultrasound Delivery
First Claim
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1. A focused ultrasound system, comprising:
- an ultrasound transducer device having a plurality of transducer elements;
an acoustic detector configured to detect signals indicative of cavitation in tissue targeted by the transducer elements;
drive circuitry coupled to the transducer elements; and
a drive signal controller coupled to the drive circuitry, the drive signal controller controlling delivery of acoustic energy from the transducer elements based at least in part on the detected cavitation signals so that a therapeutic effect at the target tissue remains within an efficacy range defined by an efficacy threshold and a safety ceiling.
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Abstract
Ultrasound energy is delivered to a patient in a controlled manner using a focused ultrasound system, thus maintaining the desired therapeutic effect without causing unwanted damage to surrounding tissue. An ultrasound transducer device includes multiple transducer elements, each of which is controlled by drive circuitry and a drive signal controller. An acoustic detector detects signals indicative of cavitation in tissue targeted by the transducer elements, and the drive signal controller manages the delivery of acoustic energy from the transducer elements based on the detected cavitation signals such that a therapeutic effect at the target tissue remains within an efficacy range.
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Citations
20 Claims
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1. A focused ultrasound system, comprising:
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an ultrasound transducer device having a plurality of transducer elements; an acoustic detector configured to detect signals indicative of cavitation in tissue targeted by the transducer elements; drive circuitry coupled to the transducer elements; and a drive signal controller coupled to the drive circuitry, the drive signal controller controlling delivery of acoustic energy from the transducer elements based at least in part on the detected cavitation signals so that a therapeutic effect at the target tissue remains within an efficacy range defined by an efficacy threshold and a safety ceiling. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method for controlling ultrasound energy being delivered to a patient using a focused ultrasound system that comprises a transducer having a plurality of transducer elements, the method comprising:
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delivering, via the transducer, ultrasound energy to a target tissue within the patient; detecting signals indicative of cavitation in the target tissue; controlling delivery of acoustic energy from the transducer elements based at least in part on the detected cavitation signals so that a therapeutic effect at the target tissue remains within an efficacy range defined by an efficacy threshold and a safety ceiling. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification