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Radiology, Vol 157, 735-740, Copyright © 1985 by Radiological Society of North America

ARTICLES

Regional myocardial dysfunction: evaluation of patients with prior myocardial infarction with fast CT

MJ Lipton, DW Farmer, EJ Killebrew, A Bouchard, PB Dean, HG Ringertz and CB Higgins

A prototype ultrafast cine computed tomographic (CT) scanner, designed specifically for cardiac imaging, was used to evaluate a preliminary series of patients with prior myocardial infarction (n = 21) and a control group without coronary artery disease (n = 5). Multilevel 50- msec CT scan exposures were obtained during peripheral intravenous bolus injections of contrast medium. A comparison was made between cine- CT scans and standard left ventriculographic images in assessing segmental left ventricular motion. Results indicate that cine CT, performed at sufficiently rapid speeds (20 scans per second) to allow useful analysis of regional ventricular wall motion, can provide adequate image quality. Analysis of 110 segments revealed a good correlation (90.9%) between the two techniques in characterizing normal from abnormal regional wall motion. Cine CT, based on this initial study, demonstrates considerable potential for evaluating not only cardiac chamber dimensions but also segmental wall dynamics.


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