Acute stroke

Both CT and MRI will, with careful interpretation, demonstrate almost all detectable cerebral infarcts within the first 12 h. They will show the early appearance of hemorrhage, although in some cases CT may be easier to interpret. Primary hemorrhages are often distinguishable from hemorrhagic stroke; the former usually show surrounding brain damage confined to the periphery of the hematoma and not extending in the territory of a major artery.

Current trends in the diagnosis of arteriosclerotic carotid stenosis or occlusion, or intracranial branch occlusions, are towards non-invasive vascular imaging (CT angiography, magnetic resonance angiography, Doppler ultrasound).

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