A combined ultrasonic imaging and dilatation catheter includes an inflatable dilatation balloon located at the distal end of a flexible catheter body. An ultrasonic imaging system including a fixed ultrasonic transducer and a rotatable reflective surface capable of deflecting an ultrasonic signal from...http://www.google.ca/patents/US5117831?utm_source=gb-gplus-sharePatent US5117831 - Vascular catheter having tandem imaging and dilatation components
