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Fig. 2F —53-year-old man with acute coronary syndrome. Invasive coronary angiography showed culprit lesion (> 75% stenosis) in left anterior descending coronary artery territory (not shown), which was stented. Nonculprit coronary lesion was identified in proximal segment of right coronary artery (RCA). CT cross-sectional luminal area analysis images through proximal (F), nonculprit lesion (G), and distal reference (H) segments show 56% stenosis. Note that plaque (arrow, G) was excluded from luminal diameter measurements.