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Related Experiment Videos

Magnetic resonance: perfusion and diffusion imaging.

M Doran1, G M Bydder

  • 1NMR Unit, Royal Postgraduate Medical School, London, England.

Neuroradiology
|January 1, 1990
PubMed
Summary
This summary is machine-generated.

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Magnetic resonance imaging techniques detect brain perfusion and diffusion changes. Advanced methods like anisotropic diffusion imaging reveal white matter tracts and lesions in various brain diseases.

Area of Science:

  • Radiology
  • Neuroimaging
  • Medical Physics

Background:

  • Magnetic resonance imaging (MRI) is crucial for assessing brain perfusion and diffusion.
  • Conventional MRI sequences may not detect subtle changes in these processes.
  • Understanding water molecule movement is key to diagnosing neurological conditions.

Purpose of the Study:

  • To review MRI techniques for detecting normal and pathological perfusion and diffusion in the brain.
  • To highlight the capabilities and limitations of intravoxel incoherent motion (IVIM) and anisotropic diffusion imaging.
  • To discuss emerging MRI approaches for improved sensitivity and reduced motion artifacts.

Main Methods:

  • Review of motion-sensitized spin-echo imaging for intravoxel coherent motion (IVCM) and IVIM.

Related Experiment Videos

  • Discussion of steady-state free precession and echo-planar imaging for rapid and sensitive assessments.
  • Explanation of anisotropic diffusion imaging for mapping white matter tract integrity.

    • Main Results:

    • IVIM and IVCM techniques can identify changes in brain diseases not visible on conventional MRI.
    • These techniques are highly susceptible to motion artifacts, impacting diagnostic accuracy.
    • Anisotropic diffusion imaging effectively demonstrates white matter tracts and their directional properties.
    • Diffusion changes are evident in diseases where water diffusion becomes less restricted.

    Conclusions:

    • MRI techniques offer valuable insights into brain perfusion and diffusion dynamics.
    • Advanced methods like anisotropic diffusion imaging provide unique capabilities for lesion localization and characterization.
    • Further development of rapid and motion-robust MRI sequences is essential for clinical translation.