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Angioplasty under ultrasound?

In this paper, we discuss some of the problems associated with attempting to image blood vessels using ultrasound from an intravascular approach. These include device miniaturisation, ultrasonic problems, difficulties with positioning and orientation of the device, and problems associated specifically with imaging catheters incorporating mechanically rotating parts. Some of the possible solutions are suggested, in terms of modification of transducer design, which may ultimately allow us to realise the goal of directing intraluminal treatment devices by means of intravascular, ultrasonic imaging.