Image of the Month

A man in his mid-50s presented to the emergency department complaining of numbness and tingling in his right hand as well as aphasia and slurred speech. CT imaging showed no signs of cerebral hemorrhage. Conventional MRI was performed 3 days later and revealed an infarct in the left basal ganglia. There was also a high-signal lesion involving the posterior limb of the left internal capsule that was positive on diffusion-weighted images for an acute infarct. To find out what susceptibility-weighted imaging revealed about the event 4 years later, see Image of the Month, page 14.