Figure 2  .

Example of ruptured right coronary plaque from a patient in group B (remodelling index ⩽ 1.05). Lumen (LU), plaque (PL), plaque cavity (CY), and vessel area (within external contour) were measured in the proximal (A) and distal reference segment (C), and at lesion site (B). Remodelling index was 0.97. Lesion and mean reference vessel area measured 15.2 mm² and 15.7 mm², respectively. Plaque cavity area was 2.6 mm² and lumen area narrowing measured 40%. Despite comparable lumen area narrowing in the two examples in figs 1 and 2, plaque cavity area was significantly smaller in the present example, which showed smaller vascular dimensions than the vessel segment of fig 1 (note the difference in the 1 mm calibration grid in figs 1 and 2).