Fig 3. Intracranial internal carotid artery calcification (iICA) score with Circularity (Dot, <90°, 90–270° and 270–360°); Thickness (Thick ≥ 1.5mm and Thin < 1.5mm) and Morphology (Indistinguishable, Irregular, Continuous).

Calcifications are highlighted (light blue). In these examples all images are in the axial viewing plane except for the <90° and 90–270° images which are in the coronal plane.