Coronary CT Angiography in the Quantitative Assessment of Coronary Plaques
Figure 3
Late fibroatheroma as classified by histology (a). Note the large necrotic core () in the center of the plaque, which correlates with the hypodense center of the plaque () in CT (b). The core is surrounded by prominent fibrotic tissue (open arrows), which appears as a hyperdense ring around the core in CT. Thus the plaque has a ring-like appearance in coronary CT angiography which was coined as napkin-ring sign. Additionally neovascularization is present within the plaque (closed arrow). Reprint with permission from [26].
