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Related Experiment Videos

Continuous arterial spin labeling using a local magnetic field gradient coil.

Robert Trampel1, Toralf Mildner, Ute Goerke

  • 1Max Planck Institute of Cognitive Neuroscience, Leipzig, Germany. trampel@cns.mpg.de

Magnetic Resonance in Medicine
|September 5, 2002
PubMed
Summary

Continuous arterial spin labeling (ASL) was demonstrated using a novel local magnetic field gradient for carotid artery imaging. This technique is independent of the main MRI scanner gradients, enabling broader applications.

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Area of Science:

  • Magnetic Resonance Imaging (MRI)
  • Biomedical Engineering
  • Neuroimaging

Background:

  • Arterial spin labeling (ASL) is a non-invasive MRI technique for quantifying blood flow.
  • Standard ASL methods rely on the main MRI scanner's gradient system for spin labeling.
  • Limitations exist in scanners with inadequate gradient performance at specific anatomical locations, like the carotid artery.

Purpose of the Study:

  • To demonstrate a novel continuous arterial spin labeling (ASL) technique.
  • To achieve adiabatic inversion of spins in the common carotid artery using a locally induced magnetic field gradient.
  • To develop an ASL method independent of the main MRI scanner's gradient system.

Main Methods:

  • Utilized a helmet resonator for imaging and a circular RF surface coil for labeling.

Related Experiment Videos

  • Employed gradient loops to generate a localized magnetic field gradient for spin inversion.
  • Implemented a spin-echo (SE) echo-planar imaging (EPI) sequence for data acquisition.
  • Performed experiments on human volunteers, focusing on the common carotid artery.

    • Main Results:

    • Successfully demonstrated continuous ASL with a locally induced magnetic field gradient.
    • The developed ASL approach proved independent of the primary MRI scanner's gradient system.
    • Showcased the feasibility of labeling spins in the common carotid artery using this localized method.

    Conclusions:

    • The novel ASL technique offers a viable alternative when conventional methods are limited by scanner gradient performance.
    • This method is particularly advantageous for head-only MRI scanners or when targeting specific arteries.
    • It represents a crucial step towards developing advanced continuous labeling systems for comprehensive in-vivo imaging.