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Open MRI Vs. Closed MRI Machine

Magnetic resonance imaging, or MRI, uses magnets to produce detailed images of the internal body. MRI machines pick up signals from the body to produce images. The stronger the signal, the better quality image is produced.

  1. Closed MRI

    • A conventional or closed MRI machine is cylindrical in shape, similar to a tunnel open at both ends. Patients lie down inside the machine, which then creates a strong magnetic field, directing radio waves at the body.

    Open MRI

    • Open MRIs function the same as a traditional MRI, but are open on all sides. They were originally created to accommodate larger patients, children or those who are claustrophobic.

    Benefits

    • The closed MRI, or "high-field" MRI because of the higher quality, produces a stronger signal and more precise image for doctors to examine. However, because traditional MRIs keep the patient confined in a small space, the open MRI makes the procedure more comfortable for trauma victims or obese patients.

    Drawbacks

    • The open MRI machine is called a "low-field" system due to its lower quality image, but is essential for larger patients and those with severe claustrophobia.

    Considerations

    • All MRI machines use magnets to function, so patients with pacemakers, metal clips or shrapnel cannot get an MRI; pregnant women are also cautioned against its use unless necessary.

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