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Fig. 1A —60-year-old man with atypical chest pain. Average heart rate
was 75.6 beats/min, and heart rate variability was 1.6 beats/min. Image
quality of 64-MDCT coronary angiography was rated good to excellent in all
segments. Curved planar CT image along centerline of left anterior descending
artery shows coronary artery stenosis in proximal segment. Reconstructions
perpendicular to proximal left anterior descending artery (magnified views
1-3) show noncalcified plaque causing approximately 70% luminal diameter
stenosis. Maximum intensity projection (inset 4) shows plaque composed of
calcified and noncalcified portions.
