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Neuroimaging: do we really need new contrast agents for MRI?

T P Roberts1, N Chuang, H C Roberts

  • 1Department of Radiology, University of California, Box 0628, 513 Parnassus Avenue, San Francisco, CA 94143, USA. tim.roberts@radiology.ucsf.edu

European Journal of Radiology
|August 6, 2000
PubMed
Summary

Contrast media significantly improve brain MRI for detecting tumors, inflammation, and ischemia by enhancing pathological structures. New agents offer advanced capabilities for vascular imaging and monitoring treatments, expanding diagnostic potential.

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Area of Science:

  • Radiology
  • Neuroimaging
  • Medical Imaging

Background:

  • Exogenous contrast media have revolutionized brain MRI, enhancing detection of pathologies like tumors, inflammation, and ischemia.
  • Contrast agents accumulate in the extravascular space due to blood-brain barrier disruption, causing signal enhancement and improving lesion delineation.
  • Magnetic resonance angiography (MRA) benefits from contrast agents for improved small vessel visualization and slow flow imaging.

Purpose of the Study:

  • To review the current applications of contrast media in neuroimaging.
  • To discuss emerging strategies and new contrast agents for advanced MR neuroimaging.
  • To explore future opportunities and unsolved problems in contrast-enhanced neuroimaging.

Main Methods:

  • Review of current literature on contrast media in MR neuroimaging.

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  • Discussion of developing strategies for new contrast agent applications.
  • Analysis of ongoing research and future potential of novel contrast agents.

    • Main Results:

    • Contrast media enhance sensitivity for detecting brain tumors, inflammation, and ischemia.
    • Dynamic MRI with contrast enables kinetic modeling of cerebral perfusion and vascular permeability.
    • New agents with prolonged intravascular residence times and specific binding show promise for advanced MRA and therapeutic monitoring.

    Conclusions:

    • Current contrast agents, combined with advanced imaging techniques, offer substantial diagnostic capabilities in neuroimaging.
    • Novel contrast agents exploiting biological specificity present significant opportunities for future neuroimaging applications.
    • Ongoing development of contrast agents is crucial for addressing unsolved problems and expanding the scope of MR neuroimaging.