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Magnetic Resonance Imaging01:24

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Magnetic resonance imaging (MRI) is a noninvasive medical imaging technique based on a phenomenon of nuclear physics discovered in the 1930s, in which matter exposed to magnetic fields and radio waves was found to emit radio signals. In 1970, a physician and researcher named Raymond Damadian noticed that malignant (cancerous) tissue gave off different signals than normal body tissue. He applied for a patent for the first MRI scanning device in clinical use by the early 1980s. The early MRI...
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Computed Tomography (CT) scan:
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Related Experiment Video

Updated: Jul 7, 2026

Noninvasive Assessment of Cardiac Abnormalities in Experimental Autoimmune Myocarditis by Magnetic Resonance Microscopy Imaging in the Mouse
12:24

Noninvasive Assessment of Cardiac Abnormalities in Experimental Autoimmune Myocarditis by Magnetic Resonance Microscopy Imaging in the Mouse

Published on: June 20, 2014

Magnetic resonance angiography.

D G Nishimura, A Macovski, J M Pauly

    IEEE Transactions on Medical Imaging
    |January 1, 1986
    PubMed
    Summary
    This summary is machine-generated.

    This study introduces magnetic resonance angiography techniques that isolate blood flow for clearer imaging. Methods like temporal subtraction and cancelling excitation remove static tissues, improving visualization of blood vessels.

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    Construction and Application of Cerebral Functional Region-Based Cerebral Blood Flow Atlas Using Magnetic Resonance Imaging-Arterial Spin Labeling

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    Area of Science:

    • Medical Imaging
    • Biophysics
    • Cardiovascular Imaging

    Background:

    • Magnetic resonance angiography (MRA) is crucial for visualizing blood vessels.
    • Traditional MRA can be limited by signals from surrounding static tissues.
    • Developing flow-specific imaging methods is essential for improved diagnostic accuracy.

    Purpose of the Study:

    • To describe novel methods for magnetic resonance angiography (MRA).
    • To present techniques that generate projection images exclusively from flowing blood.
    • To detail approaches for removing static tissue interference in MRA.

    Main Methods:

    • Discusses temporal subtraction techniques (phase/magnitude differences) for isolating blood signals.
    • Explains cancelling excitation methods for selective excitation of flowing blood.
    • Incorporates projection imaging variations: thick-slice 2-D spin-wrap, line-scan, and volumetric imaging with time-varying gradients.

    Main Results:

    • Methods effectively create projection images based solely on flowing blood.
    • Temporal subtraction and cancelling excitation successfully remove static tissue signals.
    • Integrated projection imaging techniques demonstrate utility in flow-sensitive MRA.

    Conclusions:

    • The described MRA methods enhance image clarity by focusing on blood flow.
    • These techniques offer improved visualization of vascular structures compared to conventional MRA.
    • Further application of these flow-sensitive MRA methods can advance cardiovascular diagnostics.