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Related Experiment Videos

Contrast agents in magnetic resonance imaging.

D H Carr, D G Gadian

    Clinical Radiology
    |November 1, 1985
    PubMed
    Summary

    Gadolinium diethylene triamine penta acetic acid (Gd3+-DTPA) shows promise as a paramagnetic contrast agent for magnetic resonance imaging (MRI). Early studies indicate effectiveness and no short-term toxicity, though long-term effects require further investigation.

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    Area of Science:

    • Radiology
    • Medical Imaging
    • Pharmacology

    Background:

    • Magnetic resonance imaging (MRI) is a powerful diagnostic tool.
    • Paramagnetic contrast agents enhance MRI signal.
    • Gadolinium-based agents are under investigation for clinical use.

    Purpose of the Study:

    • To review the mechanism, development, and clinical utility of paramagnetic contrast agents for MRI.
    • To evaluate the efficacy and safety of Gadolinium diethylene triamine penta acetic acid (Gd3+-DTPA).

    Main Methods:

    • Review of existing literature on paramagnetic contrast agents.
    • Analysis of animal and early clinical trial data for Gd3+-DTPA.
    • Assessment of Gd3+-DTPA biodistribution and excretion pathways.

    Main Results:

    • Gd3+-DTPA demonstrated effectiveness as a paramagnetic contrast agent in experimental and clinical settings.
    • The agent crosses a compromised blood-brain barrier.
    • Excretion is primarily via glomerular filtration, with distribution in the extracellular space.
    • No short-term toxicity was observed.

    Conclusions:

    • Gd3+-DTPA shows significant promise as a valuable addition to MRI contrast agents.
    • Further studies are needed to determine optimal dosage, pulse sequences, and imaging timing.
    • Long-term toxicity of Gd3+-DTPA remains to be established.

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