Ultrasound imaging and catheters for use therein

摘要

PCT No. PCT/GB93/00188 Sec. 371 Date Jul. 27, 1994 Sec. 102(e) Date Jul. 27, 1994 PCT Filed Jan. 28, 1993 PCT Pub. No. WO93/15419 PCT Pub. Date Aug. 5, 1993.A catheter having an ultrasonic transducer array at its distal end is constructed to overcome the "ringdown" problem by having a conically shaped reflecting interface space from an ultrasonic transducer array in such a way that the "dead space" is contained wholly within the catheter.