An ultrasound system has a catheter (10) including an elongate flexible catheter body (12) having at least one lumen (18) extending longitudinally therethrough. The catheter (10) further includes an ultrasound transmission member (30) extending longitudinally through the lumen (18) of the catheter body (12), the ultrasound transmission member (30) having a proximal end connectable to a separate ultrasound generating device (24) and a distal end coupled to the distal end of the catheter body (12). The distal end of the catheter body (12) is deflectable. The ultrasound system also includes a sonic connector (66) that connects the ultrasound transmission member (30) to an ultrasound transducer (22). The ultrasound system also provides a method for reverse irrigation and removal of particles.