The present application relates to an ultrasound catheter for disrupting occlusions in blood vessels, the ultrasound catheter comprising: an elongate flexible catheter body having a proximal end, a distal end and at least one lumen； an ultrasound transmission member extending longitudinally through the lumen of the catheter body and having a proximal end and a distal end； a distal head coupled with the distal end of the ultrasound transmission member and disposed adjacent the distal end of the catheter body； a sonic connector coupled with the proximal end of the ultrasound transmission member for coupling the ultrasound transmission member with an ultrasound transducer device； and a connector housing coupled with the proximal end of the catheter body for housing the sonic connector and a proximal portion of the ultrasound transmission member, wherein the catheter housing includes a hollow inner bore, the bore having a proximal segment, a middle segment and a distal segment, the middle segment having a smaller diameter than both the proximal segment and the distal segment, the proximal segment including the sonic connector, and wherein absorber members are disposed so as to surround a portion of the ultrasound transmission member and are disposed within the proximal and/or distal segment of the bore.
