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Functional Transcranial Doppler Ultrasound for Monitoring Cerebral Blood Flow
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Functional Transcranial Doppler Ultrasound for Monitoring Cerebral Blood Flow.

Benjamin D Hage1, Edward J Truemper1, Gregory R Bashford2

  • 1Department of Biological Systems Engineering, University of Nebraska-Lincoln.

Journal of Visualized Experiments : Jove
|March 29, 2021
PubMed
Summary
This summary is machine-generated.

Functional transcranial Doppler ultrasound (fTCD) measures brain activity by tracking blood flow changes. This guide details fTCD methods for functional imaging experiments, including probe placement and a breath-holding test.

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Area of Science:

  • Neuroscience
  • Medical Imaging
  • Physiology

Background:

  • Functional transcranial Doppler ultrasound (fTCD) utilizes transcranial Doppler ultrasound (TCD) to assess neural activation.
  • Neural activation is indicated by increased cerebral blood flow velocity (CBFV) in response to stimuli.
  • fTCD estimates cerebral blood flow (CBF) changes using CBFV measurements, complementing other functional imaging techniques.

Purpose of the Study:

  • To provide step-by-step instructions for conducting functional imaging experiments using fTCD.
  • To detail the methodology for identifying and optimizing signals from the middle cerebral artery (MCA).
  • To demonstrate the application of fTCD through a breath-holding experiment.

Main Methods:

  • Utilizes transcranial Doppler ultrasound (TCD) to measure cerebral blood flow velocity (CBFV).
  • Involves identifying the middle cerebral artery (MCA) and optimizing signal acquisition.
  • Describes the use of a fixation device for stable probe placement during experiments.
  • Demonstrates a breath-holding paradigm as a functional imaging task.

Main Results:

  • fTCD provides high temporal resolution measurements of blood flow velocities in major cerebral arteries.
  • The described methods allow for the estimation of changes in cerebral blood flow (CBF) during neural activation.
  • Successful application of fTCD in a breath-holding experiment is demonstrated.

Conclusions:

  • fTCD is a valuable tool for studying neural activation with high temporal resolution.
  • This paper provides a practical guide for implementing fTCD in functional neuroimaging research.
  • The demonstrated methods facilitate the use of fTCD for various functional activation studies.