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Figure 2 Quantitative intravascular ultrasound assessment (mean ± SD) of late stent enlargement ( stent), neointimal hyperplasia area (NIH), and late lumen loss ( lumen) at designated sites of the internal carotid artery (ICA) and common carotid artery (CCA) stent. (Top) Absolute changes (mm²). (Bottom) Percentage change (%). The p values refer to a comparison of changes amongst different segments of the stent. Solid bars = ICA lesion site; open bars = reference site ICA stent; gray bars = minimal lumen diameter CCA stent; ruled bars = reference site CCA stent. *p < 0.05; **p < 0.01; ***p < 0.001.