Figure 1: (a, b) Fluid-attenuated inversion recovery axial images showing watershed infarcts in the bilateral centrum semiovale (arrows). (c) Time-of-flight magnetic resonance angiography image showing narrowing of the bilateral supraclinoid internal carotid arteries (right > left). (d) T2-weighted axial image showing thin net-like collaterals in the basilar cistern. (e) T2-weighted axial image showing left basal ganglia atrophy; no infarct/collaterals/flow void noted in the basal ganglia. (f) Susceptibility-weighted imaging axial image showing mineralization (blooming) involving left basal ganglia. (g) Arterial spin labeling perfusion cerebral blood flow map showing right frontal and bilateral parietal hypoperfusion. (h) Arterial spin labeling perfusion cerebral blood flow map showing bilateral frontal hypoperfusion (right > left) and left basal ganglia hypoperfusion (arrow)