Fig 1.

(a) Schematic diagram showing the features of vulnerable plaques and the white arrow shows the presence of an ulceration. In panel (b), a computed tomography angiography axial image obtained in a 63-year-old man with transient ischemic attack shows the presence of an ulceration in the left common carotid artery (white open arrow). (c) The time-of-flight (TOF) magnetic resonance (MR) of a 59-year-old man with ischemic stroke shows the presence of small ulcers in the left bifurcation (white open arrow).