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Related Experiment Videos

Future uses of MR imaging agents

B R Rosen1, T J Brady

  • 1Department of Radiology, Massachusetts General Hospital, Charlestown 02129.

Journal of Computer Assisted Tomography
|January 1, 1993
PubMed
Summary

New paramagnetic and superparamagnetic agents enhance magnetic resonance (MR) imaging. These agents, used with ultrafast MR techniques, enable detailed mapping of blood-brain barrier permeability, organ hemodynamics, and cellular-level function in various diseases.

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Area of Science:

  • Medical Imaging
  • Biomedical Engineering
  • Radiology

Background:

  • Paramagnetic and superparamagnetic agents are crucial for advancing Magnetic Resonance (MR) imaging.
  • Ultrafast MR techniques like echoplanar imaging and turboFLASH (fast low-angle shot) are key to novel imaging applications.

Purpose of the Study:

  • To explore the potential of existing and novel MR contrast agents.
  • To demonstrate their application in quantitative dynamic blood-brain barrier permeability mapping.
  • To showcase their utility in assessing regional hemodynamic profiles and enabling function-specific imaging.

Main Methods:

  • Utilizing relaxivity agents (e.g., dysprosium, gadolinium) to alter T1 characteristics.
  • Employing magnetic susceptibility agents like monocrystalline iron oxide nanoparticles (MIONs).

Related Experiment Videos

  • Integrating these agents with ultrafast MR imaging sequences.

    • Main Results:

    • Quantitative maps of dynamic blood-brain barrier permeability were generated.
    • Regional hemodynamic profiles of diseased organs, including the heart, were established.
    • Regional cerebral blood volume mapping during various brain states was achieved.
    • Function-specific imaging at the cellular level was enabled for diverse pathologies.

    Conclusions:

    • Paramagnetic and superparamagnetic agents significantly expand the capabilities of MR imaging.
    • These agents, combined with advanced MR techniques, offer powerful tools for diagnosing and understanding diseases.
    • The development of novel magnetopharmaceuticals promises further breakthroughs in medical diagnostics and research.