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Related Experiment Videos

Human brain infarction: proton MR spectroscopy.

J H Duijn1, G B Matson, A A Maudsley

  • 1Department of Veterans Affairs Medical Center, San Francisco, CA 94121.

Radiology
|June 1, 1992
PubMed
Summary
This summary is machine-generated.

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Two-dimensional magnetic resonance (MR) spectroscopic imaging revealed significant reductions in brain metabolites like N-acetyl aspartate (NAA) in stroke-affected areas. Lactate was consistently detected in infarcted brain tissue, indicating increased anaerobic glycolysis.

Area of Science:

  • Neuroimaging
  • Biochemistry
  • Neurology

Background:

  • Stroke leads to significant changes in brain tissue composition.
  • Metabolite alterations can serve as biomarkers for brain injury.

Purpose of the Study:

  • To investigate the distribution of key brain metabolites in normal and infarcted human brain tissue using MR spectroscopic imaging.
  • To quantify changes in choline, creatine, NAA, and lactate concentrations post-stroke.

Main Methods:

  • Two-dimensional proton MR spectroscopic imaging was employed.
  • A double spin-echo localization method was used to select a 20-mm-thick brain section.
  • Metabolite distributions were analyzed in 6 normal and 10 infarcted human brains.

Main Results:

Related Experiment Videos

  • Normal brain exhibited symmetric metabolite distributions and no detectable lactate.
  • Infarcted brain showed significant decreases in NAA (77%), creatine (63%), and choline (54%) compared to control areas.
  • Lactate was present in all infarcted tissue and/or ventricles, suggesting anaerobic glycolysis.

Conclusions:

  • MR spectroscopic imaging effectively detects metabolic alterations in infarcted brain tissue.
  • Decreased metabolite levels, particularly NAA, are linked to reduced cell density post-stroke.
  • Lactate presence indicates ongoing anaerobic glycolysis in ischemic brain regions.