Reversible impairment in cognition and midbrain hematoma.

A 78-year-old man presented with a 2-week history of cognitive decline. Computed tomography (CT) showed obstructive hydrocephalus due to a small midbrain hematoma. He regained premorbid neurological status after ventriculostomy.

Neuroimaging criteria for vascular dementia.

Objective: To examine published imaging criteria that separate cranial computed tomographic (CT) scans into grades of increasing support for a diagnosis of vascular dementia (VaD).

Design: Patients were divided into 4 grades of increasing extent of vascular lesions on CT. The frequency of VaD was compared between these grades.