Ischemic stroke MRI

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]

Overview

MRI

For diagnosing ischemic stroke in the emergency setting:[1]

MRI scan

sensitivity= 83%
specificity= 98%

MRI scan

sensitivity= 81%
specificity= 100%

For detecting chronic hemorrhages, an MRI scan is more sensitive.[2]

For the assessment of stable stroke, nuclear medicine scans SPECT and PET/CT may be helpful. SPECT documents cerebral blood flow and PET with FDG isotope the metabolic activity of the neurons.

Patient No 1: Change in Mental Status

(Images courtesy of RadsWiki)

Patient No 2: Left ACA Infarction




References

  1. Chalela, J (2007). "Magnetic resonance imaging and computed tomography in emergency assessment of patients with suspected acute stroke: a prospective comparison". Lancet. 369 (9558): 293–8. PMID 17258669. Retrieved 2008-01-22. Unknown parameter |coauthors= ignored (help)
  2. Kidwell, C (2004). "Comparison of MRI and CT for detection of acute intracerebral hemorrhage". JAMA. 292 (15): 1823–30. PMID 15494579. Retrieved 2008-01-22. Unknown parameter |coauthors= ignored (help)

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