• Loukianos Gatzoulis, Kumar V Ramnarine, Stephen D Pye, Tom Anderson, David E Newby, Peter R Hoskins, and W Norman McDicken.
• Department of Medical Physics and Medical Engineering, University of Edinburgh, Edinburgh, UK.
• Ultrasound Med Biol. 2003 Jan 1; 29 (1): 53-64.

AbstractThe aim of this work was to investigate the potential of a novel forward-viewing intravascular ultrasound (IVUS) system for flow quantification and colour flow imaging combined with B-mode imaging. A stiff 3.8-mm diameter catheter was used to scan a 72 degrees sector ahead of its tip. Operating at 30 MHz, the catheter was integrated with an IVUS scanner and a radiofrequency (RF) data-acquisition system. RF data were software processed for producing B-mode images and deriving velocity estimates. Steady flow in the range of 45 to 146 mL/min toward the catheter, was used in wall-less tissue-mimicking phantoms simulating healthy lumen (8-mm diameter), 30% diameter symmetrical stenosis and 37% diameter eccentric stenosis. The system provided colour flow images and good estimation of peak velocity and volumetric flows (within 1% to 9% and 16% to 48%, respectively, of calculated values) at 5 to 7 mm distal to the catheter. A sector forward-viewing IVUS imaging/Doppler system is suitable for combined anatomical and functional assessment of stenosed vessels.Copyright 2003 World Federation for Ultrasound in Medicine & Biology

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