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→Choice of modality: Detailed
===Choice of modality===
*'''[[CT of the head in stroke]]''' is generally the first investigation because of high availability.<ref name=Radiologyassistant-stroke>{{cite web|url=http://www.radiologyassistant.nl/en/p483910a4b6f14/brain-ischemia-imaging-in-acute-stroke.html|title=Brain Ischemia - Imaging in Acute Stroke|website=Radiology Assistant|author=Majda Thurnher}} Published: June 2008</ref> It detects about 60% of infarcts in the first 3 to 6 hours, and almost always thereafter.<ref name=Radiologyassistant-stroke/>
*'''[[MRI of the head in stroke]]''' is generally less available, but preferred if there are no MRI contraindications, and your clinic has established procedures for its performance in acute stroke(if you don't know, it is reasonable to assume that there is not, and there are no MRI contraindicationsdo [[CT of the head in stroke|CT]]).
Still not sure? See: '''[[CT vs MRI in stroke]]'''
