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Related Experiment Videos

Flow quantification in the superior sagittal sinus using magnetic resonance.

H Mattle1, R R Edelman, M A Reis

  • 1Harvard Medical School, New England Deaconess Hospital, Boston, MA.

Neurology
|May 1, 1990
PubMed
Summary

This study introduces a new magnetic resonance (MR) technique for noninvasively measuring cerebral venous flow. The novel method allows for dynamic assessment of global cerebral blood flow (CBF) and its changes.

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Area of Science:

  • Neuroimaging
  • Vascular Neurology
  • Medical Physics

Background:

  • Intracerebral veins and venous sinuses were previously difficult to study noninvasively.
  • Assessing cerebral venous flow is crucial for understanding brain health and disease.

Purpose of the Study:

  • To describe and validate a novel magnetic resonance (MR) "bolus tracking" technique for noninvasive measurement of cerebral venous flow.
  • To assess global cerebral blood flow (CBF) using measurements from the superior sagittal sinus.

Main Methods:

  • Developed and applied a "bolus tracking" MR imaging technique.
  • Measured flow in the superior sagittal sinus in 10 healthy subjects and 21 patients.
  • Evaluated dynamic changes in cerebral blood flow (CBF) during hyperventilation and hypercapnia.

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Main Results:

  • Successfully measured mean flow in the superior sagittal sinus at 420 ml/min.
  • Identified a significant inverse correlation between cerebral venous flow and age.
  • Observed dynamic alterations in CBF in response to hyperventilation and hypercapnia.

Conclusions:

  • The MR "bolus tracking" technique offers a noninvasive method for quantifying cerebral venous flow.
  • This technique provides a valuable index of global CBF and its dynamic changes.
  • The method holds potential for monitoring neurological conditions and the impact of therapeutic interventions on CBF.