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Medical Health Encyclopedia
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Spine MRI

Osteoarthritis Questions and AnswersBack Pain InformationCauses of Back Pain



MRI scans
MRI scans
Skeletal spine
Skeletal spine
Vertebra, lumbar (low back)
Vertebra, lumbar (low back)
Vertebra, thoracic (mid back)
Vertebra, thoracic (mid back)
Posterior spinal anatomy
Posterior spinal anatomy


Spine MRI

Definition:

Magnetic resonance imaging (MRI) of the spine is a noninvasive procedure that uses powerful magnets and radio waves to create pictures of the components that make up the spine -- the vertabrae (spine bones), the spinal cord, and the spaces between the vertebrae through which the nerves travel.

Unlike conventional radiography and CT imaging, which uses radiation (X-rays) passing through a patient to generate images, MRI is based on the magnetic properties of atoms.

Text Continues Below



MRI scans differentiate between organs, and potentially, provide contrast between benign (non-cancerous) and malignant (cancerous) tissue. Any of the images collected can be stored in a computer or printed on film. MRI can easily be performed through clothing and bones. Certain types of metal, however, in or around the area under investigation can cause significant errors, called artifacts, in the images.

Alternative Names:
Magnetic resonance imaging - spine; Nuclear magnetic resonance - spine; MRI of the spine; NMR - spine

How the test is performed:

Since MRI makes use of radio waves very close in frequency to those of ordinary FM radio stations, the scanner must be located within a specially shielded room to avoid outside interference. The patient will be asked to lie on a narrow table which slides into a large tunnel-like tube within the scanner.

Sometimes an IV is placed in the patient's hand or forearm, to allow contrast medium to be given. A technologist will operate the machine and observe you during the entire study from an adjacent room.

Several sets of images are usually required, each taking from 2-15 minutes. A complete scan may take up to 1 hour. Newer scanners may complete the process in less time.

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