A system for delivering ultrasound energy to a treatment section in a vessel is disclosed. The system includes a sheath with a utility lumen and an energy delivery section at least partially constructed from a material which transmits ultrasound energy. The system also includes a drug delivery member...http://www.google.ca/patents/US20030216681?utm_source=gb-gplus-sharePatent US20030216681 - Sheath for use with an ultrasound element
