A catheter for delivering ultrasonic energy and therapeutic compounds to a treatment site within a patient's vasculature comprises a tubular body. The tubular body has a proximal region and a distal region opposite the proximal region. The catheter further comprises a plurality of fluid delivery lumens...http://www.google.com.au/patents/US7727178?utm_source=gb-gplus-sharePatent US7727178 - Catheter with multiple ultrasound radiating members
