Fig. 1.

Schematic examples of three different determinations of stent eccentricity (SE). SE is defined as minimum stent diameter (D1) divided by maximum stent diameter (D1'). Outer lager circle and smaller circle on each slice mean EEM and stent CSA, respectively. (A) SE-NIH was determined at the lesion site with maximal %NIH area on the follow-up IVUS. (B) SE-MSA was determined at the site with MSA. (C) SE-mean was determined by the averaged SE through the entire stent at the interval of 1 mm. EEM, external elastic membrane; CSA, cross-sectional area; NIH, neointimal hyperplasia; MSA, minimal stent area.