Fig. 1

A case example of coronary stenosis on cCTA-based CDI and CT-FFR analysis. A 53-year-old man without MACEs who underwent CDI and CT-FFR analysis based on cCTA. A CDI analysis based on cCTA demonstrated that the lumen area was 11.8 mm² at the early diastolic (40%) of the left anterior descending (LAD) artery 5 mm distal to the narrowest of the left main coronary artery. B CDI analysis based on cCTA demonstrated that the lumen area was 9.8 mm² at the mid diastolic (75%) of the LAD artery 5 mm distal to the narrowest of the left main coronary artery. C shows no hemodynamically significant LAD lesion with a CT-FFR value of 0.82. The green data indicates the maximum diameter and red data indicates the minimum diameter. The red circle indicates that the measured position is the left anterior descending branch located distally 2 cm to the stenosis. MACEs, major adverse cardiac events; cCTA, coronary computed tomography angiography; CDI, coronary distensibility index; CT-FFR, cCTA-derived fractional flow reserve