FOCUSED ULTRASOUND SYSTEM WITH FAR FIELD TAIL SUPPRESSION

摘要

A system for treating body tissue using acoustic energy includes a controller (106) configured to (i) identify a target focal zone (104) of tissue to be treated based on acquired image data, (ii) cause delivery of a first pulse of acoustic energy from a transducer (102) to generate bubbles in a tissue region located distally, relative to the transducer, of a focal center of the target focal zone, and (iii) cause delivery of a second pulse of acoustic energy from the transducer in the presence of the bubbles generated by the first pulse, the second pulse focused at the focal center to thermal tissue ablation. Alternatively or additionally to (ii) and (iii), the system may be configured to cause delivery of a plurality of thermal ablation pulses distributed symmetrically about the focal center.