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High-risk plaque features on CCTA. (A) Positive (Glagov) remodelling of plaque (yellow lines) maintains the coronary lumen (white lines) by outwardly remodelling atheromatous wall of the vessel. (B) Low-density non-calcified plaque (<30 HU) (white arrowhead). (C) Spotty calcification (white arrowhead. (D) Napkin ring sign (lumen—white line; plaque—yellow arrowhead). CCTA, coronary CT angiography.
