A method for treating body tissue using acoustic energy includes identifying a target focal zone of tissue to be treated, delivering a first pulse of acoustic energy from a transducer to generate bubbles in a tissue region located distally, relative to the transducer, of a focal center of the target...http://www.google.se/patents/US20080082026?utm_source=gb-gplus-sharePatent US20080082026 - FOCUSED ULTRASOUND SYSTEM WITH FAR FIELD TAIL SUPPRESSION
