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Related Experiment Videos

Callosal changes in obstructive hydrocephalus: observations with FLAIR imaging, and diffusion MRI.

R N Sener1

  • 1Department of Radiology, Ege University Hospital, Bornova, 35100, Izmir, Turkey. rnsener@hotmail.com

Computerized Medical Imaging and Graphics : the Official Journal of the Computerized Medical Imaging Society
|September 3, 2002
PubMed
Summary

Sagittal FLAIR MRI can identify mild hydrocephalus by measuring inner callosal thickness. This imaging technique reveals fluid accumulation, distinguishing normal brains from those with obstructive hydrocephalus.

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Area of Science:

  • Neuroimaging
  • Radiology
  • Neurology

Background:

  • Obstructive hydrocephalus involves abnormal cerebrospinal fluid accumulation.
  • Accurate diagnosis, especially of milder forms, is crucial for timely intervention.
  • The inner callosal layer's response to fluid shifts is not fully understood.

Purpose of the Study:

  • To evaluate the utility of sagittal FLAIR MRI in detecting and assessing obstructive hydrocephalus.
  • To quantify the thickness of the inner callosal layer in normal individuals and hydrocephalus patients.
  • To investigate diffusion MRI parameters in relation to transependymal water resorption.

Main Methods:

  • Sagittal and transverse FLAIR MRI scans were performed on 16 normal individuals and 24 hydrocephalus patients.

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  • Inner callosal surface thickness was electronically measured.
  • Diffusion MRI with echo-planar imaging was used in a subset of patients (12 moderate-to-severe hydrocephalus, 8 controls).

    • Main Results:

    • The inner callosal layer was significantly thicker in hydrocephalus patients (0.29-1.10 cm) compared to controls (0.15-0.25 cm).
    • Thickness correlated with hydrocephalus severity, with mild cases showing 0.29-0.40 cm and moderate-to-severe cases 0.50-1.10 cm.
    • Apparent diffusion coefficient (ADC) values were higher in hydrocephalus patients (1.30-2.20 x 10^-3 mm²/s) compared to controls (0.78 x 10^-3 mm²/s).

    Conclusions:

    • Sagittal FLAIR MRI is effective for identifying hydrocephalus, particularly milder forms, by assessing inner callosal layer thickness.
    • Increased inner callosal thickness reflects transcallosal water accumulation.
    • Elevated ADC values suggest transependymal water resorption in moderate-to-severe hydrocephalus.