Arterial Imaging With a New Forward‐Viewing Intravascular Ultrasound Catheter, IInitial Studies
作者:
James Evans,
Kok-Hwee Ng,
Michael Vonesh,
Barry Kramer,
Sheridan Meyers,
Terry Mills,
Bonnie Kane,
William Aldrich,
Yue-Teh Jang,
Paul Yock,
Michael Rold,
Sanford Roth,
David McPherson,
期刊:
Circulation
(OVID Available online 1994)
卷期:
Volume 89,
issue 2
页码: 712-717
ISSN:0009-7322
年代: 1994
出版商: OVID
关键词: ultrasonics;imaging;catheters
数据来源: OVID
摘要:
BackgroundIntravascular ultrasound (IVUS) of arteries is limited by the inability of current instruments to visualize beyond the catheter tip. We have developed a prototype 4-mm-diameter forward-viewing IVUS catheter (Cardiovascular Imaging Systems, Sunnyvale, Calif) that has the ability to provide B-mode cross-sectional ultrasound data for a distance of up to 2 cm distal to the catheter tip.Methods and ResultsTo study the utility of this device, a 20-MHz forward-viewing IVUS catheter was used to examine 13 arterial segments (5 human femoral arteries, 1 human carotid artery, 7 canine arteries) in vitro and 1 phantom. After imaging, all data were compared with histology (Histo). In all cases, the IVUS catheter provided forward-viewing images corresponding to the arterial geometry and demonstrated vascular landmarks and atherosclerotic lesions. There was a good correlation between Histo-determined luminal diameters (LD) and IVUS-determined diameters for a distance of 14 mm ahead of the catheter tip: IVUS LD= 1.0 Histo LD+ 1.3 (r= .87).ConclusionsThese preliminary data suggest that a forward- viewing IVUS catheter is feasible, accurate, and useful for evaluation of arterial geometry distal to the catheter tip.
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