Fig. 4.

Magnetic resonance (MR) images demonstrate hyperintense diffusion-weighted signal (A) with hypointense apparent diffusion coefficient signal (B) and hyperintense FLAIR signal (C) involving the left corona radiata, basal ganglia, and internal capsule, consistent with an acute left sided middle cerebral artery (MCA) territory infarct. Concomitant MR angiography (D) demonstrates minimal flow signal in the internal carotid artery at the skull base without visualization of flow signal in the left MCA distribution; supply to the left A2 segment is via the anterior communicating artery.