Figure 3.

Adverse coronary plaque characteristics identified on computed tomography coronary angiography. Coronary atherosclerotic plaque features detected using computed tomography coronary angiography including (A) positive remodelling—defined as an outer vessel diameter (large yellow line) 10% greater than the mean diameter of the segments immediately proximal (small yellow line) and distal to the plaque; (B) low attenuation plaque—defined as a focal central area of plaque with an attenuation density of <30 Hounsfield Units (yellow arrow); (C) spotty calcification—defined as focal calcification within the coronary artery wall <3 mm in maximum diameter (yellow arrow); and (D) the ‘napkin ring’ sign—defined as a central area of low attenuation plaque with a peripheral rim of high attenuation (yellow arrow).