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Computerized tomography in selected intracranial vascular abnormalities.

H D Thompson, H C Press, J E Smith

    Southern Medical Journal
    |March 1, 1979
    PubMed
    Summary
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    Computerized axial tomography (CAT) scans effectively detect intracranial abnormalities. Acute blood appears as high density, while ischemia shows as low density on CAT scans.

    Area of Science:

    • Radiology
    • Neurology
    • Medical Imaging

    Background:

    • Computerized axial tomography (CAT) is a valuable diagnostic tool for intracranial abnormalities.
    • Accurate interpretation of CAT scan findings is crucial for patient management.

    Purpose of the Study:

    • To outline the utility of CAT scans in identifying various intracranial pathologies.
    • To describe the characteristic imaging findings of acute blood, increased blood volume, and ischemia on CAT scans.

    Main Methods:

    • Review of CAT scan imaging characteristics for different intracranial conditions.
    • Analysis of density measurements (Hounsfield units) in precontrast and postcontrast studies.

    Main Results:

    • Acute extravasated blood presents as increased density (70-90 HU) on precontrast CAT scans.

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  • Increased blood flow or volume enhances density on postcontrast studies.
  • Nonhemorrhagic ischemia is identified by persistent low density areas.

    • Conclusions:

    • CAT scanning is a reliable method for diagnosing intracranial abnormalities.
    • Distinct density patterns on precontrast and postcontrast scans aid in differentiating lesion types, including hemorrhage and ischemia.