Patent ID: 7258674
Filing Date: 2007-08-21
Classification: A61B,A61N

Abstract:
1. A medical high intensity focused ultrasound system fro providing in vivo therapy to a volume of living tissue, the system comprising: a high intensity focused ultrasound transducer having a plurality of transducer elements for treatment of a volume of living tissue; a controller for driving said transducer with power, said controller having a receive path for detecting acoustic information from said volume of living tissue, the receive path comprising: a first receive channel for detecting boiling, detection determined by analyzing incommensurate sub harmonic frequencies (xf/n) within said volume of tissue; and a second receive channel for detecting cavitation, detection determined by analyzing sub harmonic frequencies (f/n) within said volume of living tissue; wherein the power of the transducer is set in response to detecting boiling and/or cavitation.