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Related Experiment Videos

Acute stroke: evaluation with serial proton MR spectroscopic imaging

P B Barker1, J H Gillard, P C van Zijl

  • 1Department of Radiology, Johns Hopkins University School of Medicine, Baltimore, MD 21205.

Radiology
|September 1, 1994
PubMed
Summary

Proton magnetic resonance (MR) spectroscopic imaging detects metabolic changes in acute stroke earlier than conventional MR imaging. This technique maps ischemic and infarcted brain regions with greater sensitivity, aiding in early stroke diagnosis.

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Area of Science:

  • Neuroimaging
  • Metabolic imaging
  • Stroke research

Background:

  • Acute stroke diagnosis relies on conventional MR imaging, which may have limitations in early detection of metabolic changes.
  • Proton magnetic resonance (MR) spectroscopic imaging offers a novel approach to assess brain metabolism.

Observation:

  • Conventional MR imaging showed no abnormalities at 3 hours post-stroke.
  • Spectroscopic imaging revealed elevated cerebral lactate levels at 24 hours, preceding infarction.
  • Chronic infarcts (5 months) showed reduced N-acetylaspartate, increased choline, and absent lactate.

Findings:

  • Proton MR spectroscopic imaging detects metabolic alterations in acute stroke.
  • Elevated lactate levels at 24 hours indicate developing infarction.

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  • Metabolic profiles evolve from lactate elevation to reduced N-acetylaspartate and increased choline in chronic infarcts.

    • Implications:

    • Spectroscopic imaging provides earlier and more sensitive detection of ischemic and infarcted brain regions compared to conventional MR imaging.
    • This technique can enhance the understanding and management of acute stroke.
    • Metabolic mapping aids in differentiating acute from chronic stroke changes.