Magnetic Resonance Imaging
A magnetic resonance imaging scan is a technique performed by radiologists that involves using magnetism, radio waves and computers to produce detailed images of the body’s internal structures, including tissues, muscles, arteries, bones and unusual growths. A number of patients credit the MRI scan with the discovery of an existing medical condition they never knew about. For instance, one patient at www.medicinenet.com said she experienced numbness along one side of her body after giving birth to her baby and although the doctor thought it was nothing, a medical imaging test uncovered a very large arterial venous malformation in her brain. Another patient says she discovered her leg pain was not due to an inflamed sciatic nerve, as previously thought, but to several crushed discs in her back. Thanks to this technology, doctors were better able to treat these patients.
Radiologists use the MRI technique in diagnosing and determining treatment for medical problems. Neurosurgeons use an MRI scan to evaluate brain, neck and spinal cord injury following an accident. They can find crushed discs or vertebrae and they can look for internal bleeding, swelling, rips or aneurysms. Cardiologists use the MRI to look at the heart and aorta, not to mention clogging and perforations. Diseases, tumors, unusual growths and damaged soft tissue are all evident with an MRI of the brain and body.
To prepare for a magnetic resonance imaging scan, patients will need to remove all metallic objects prior to the procedure. If an individual suffers from claustrophobia anxiety, a mild sedative will be administered. Sometimes patients bring headphones in with them to induce relaxation because they must remain completely still for the best results. Inside the magnetic machine, the patient will hear a loud whirring sound as the scan takes place, along with repetitive clicking noises as if a camera is snapping pictures. Flashes may occasionally be seen as the 30 minute to ninety minute procedure takes place. Sometimes patients require injections of liquid contrast material to enhance the images.
In addition to helping diagnose many people, magnetic resonance imaging has also been a great help in showing medicine administration professionals how the brain works. Most recently, they used an MRI of the brain to show the effectiveness of stem cell migration in treating brain damage. “By monitoring the motion of these cells, you get information about how viable they are, and how they can benefit the tissue. We have been able to prove that these stem cells travel within the brain, and only travel where they are needed. They read the chemical signalling of the tissue, which indicate areas of stress. And then they go and try to repair the situation,”explains Dr. Yoram Cohen of Tel Aviv University, who ran the study. In the future, many more applications of MRI technology may be revealed.
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