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Figure 4 Contrast-enhanced, 16 detector-row computed tomography angiography of the coronary arteries in a 65-year-old patient. (A) Maximum-intensity projection along the course of the proximal left coronary artery shows a large non-calcified coronary artery plaque in the distal left main coronary artery (arrow). (B) A cross-sectional image reconstruction of the corresponding vessel region proves significant lumen obstruction due to the concentric plaque. (C) Using dedicated post-processing tools, the vessel can be stretched longitudinally and rotated in any direction for improved visualization of the plaque.