Patent ID: 9050449
Filing Date: 2015-06-09
Classification: A61B,A61N,Y02A

Abstract:
1. A system for treating a volume of tissue with high intensity focused ultrasound (HIFU), the system comprising: a hand-held or hand-guided HIFU applicator; a HIFU transducer having a moveable transducer focal zone, wherein the HIFU transducer is configured to deliver HIFU treatment signals to a targeted volume of tissue at a treatment site; and a processor programmed to cause the HIFU transducer to deliver the HIFU treatment signals in a pattern at a periphery of the targeted volume of tissue, wherein the processor is programmed to determine a power level for the HIFU treatment signals by referencing predetermined data stored in a memory that relates power applied in HIFU treatment signals by the HIFU transducer to power contained in the HIFU treatment signals at the focal zone at a fundamental frequency or one or more harmonics of the fundamental frequency, and based on the predetermined data, selecting a power level for the HIFU treatment signals such that a portion of the power at the fundamental frequency of the HIFU treatment signals is converted to power at a harmonic of the fundamental frequency at the treatment site.