prov:value
| - Of particular interest to the present invention are procedures which produce a real time visual image, such as ultrasonic imaging procedures, and in particular transesophageal ultrasound (as described in U.S. Pat. Nos. 4,466,443 and 4,633,882, the disclosure of which are incorporated herein by reference) and intravascular ultrasound (as described in U.S. Pat. Nos. 4,794,931 and 5,000,185, the disc
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