Parkinsonism in patients with vascular dementia: clinical, computed- and positron emission-tomographic findings.

Purpose: The present study investigates the vascular nature of parkinsonian features in patients with 'probable' vascular dementia.

Patients And Methods: Forty patients with vascular dementia were studied with positron emission tomography (PET) using the steady state technique with (15)O in order to assess regional cerebral blood flow (rCBF), regional oxygen extraction rate (rOER) and regional metabolic rate for oxygen (rCMRO(2)) in different brain regions. The findings in 10 patients with (VaDP) were compared to 30 without parkinsonism (VaD).

Posttraumatic subdural hygroma: CT findings and differential diagnosis.

Subdural hygroma is a cerebrospinal fluid accumulation in the subdural space. It is an epiphenomenon of head injury. CT is the preferred diagnostic imaging modality.