Fig. 7

Comparison of IVUS images between Takayasu arteritis and typical neointimal hyperplasia observed in in-stent restenosis. In Takayasu arteritis, heterogeneous and relatively high echo were observed, and the most distinctive features are unrecognized media (arrowheads) and the expanse of fibrotic thickening from the media to the adventitia (arrows) (a and b). The typical findings in neointimal hyperplasia reveal homogeneous, concentric and echolucent patterns (c)