Figure S1.

Sixty-nine years old woman with stable fibrous plaque in the main stem of the left anterior descending artery. (A,B) Coronary CTA images with MIP and CPR demonstrates marked vascular lumen narrowing in the main stem of the left anterior descending artery (white arrow); (C) axial coronary CTA image shows the napkin-ring sign (white arrow) and the plaque with a CT value of 92.9 HU; (D) IVUS image shows eccentric fibrous plaque in the left main stem, and does not suggest the plaque was unstable. CTA, computed tomographic angiography; MIP, maximum intensity projection; CPR, curved planar reformation; IVUS, intravascular ultrasound.