fig2

Figure 2. Intravascular ultrasound (IVUS) and optical coherence tomography (OCT) demonstration of coronary calcifications. In (A), an echodense image is observed on IVUS consistent with intimal calcification extending for about 2 quadrants, from 6 to 10 o’clock. In (B), a calcified ring is evident along the entire vessel circumference. In (C), a “signal-poor” image with well-defined margins is evident on OCT from 1 to 4 o’clock (asterisk), consistent with superficial calcifications. In (D), a voluminous calcific nodule is observed (asterisk) protruding into the vessel from 10 to 1 o’clock.