$Unique_ID{BRK00845}
$Pretitle{Special Procedures and Laboratory Tests}
$Title{Information on Magnetic Resonance Imaging}
$Subject{magnetic resonance diagnostic imaging}
$Volume{P}
$Log{}

Copyright (c) 1991   Tribune Media Services, Inc.


Information on Magnetic Resonance Imaging


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QUESTION:  Would you please discuss the technology that involves the use of
magnetism to produce pictures that look like X-Rays?  I am about to have one
and could use a bit of information and reassurance.

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ANSWER:  I think you are referring to MRI, (which stands for Magnetic
Resonance Imaging), an important and relatively new development in medical
evaluation and diagnosis.  It uses computers and magnetic fields to create
images of virtually any area of the body, whereas other more familiar
techniques use radiation, as in CT scans or sound waves, as in sonograms.  For
certain areas, particularly the central nervous system, MRI is perhaps better
than all other imaging techniques.  For example, it has become the most single
most sensitive procedure for diagnosing multiple sclerosis.  It is also
beneficial for examining the pelvis, muscles, tendons and ligaments, and
various organs such as the kidneys, ovaries, and uterus.  And, it shows
promise for the heart and abdomen as well.
     One of the major advantages of MRI (sometimes called NMR for Nuclear
Magnetic Resonance, the scientific principle upon which the technique is
based) as a diagnostic tool is its ability to create high quality images
directly without the use of invasive procedures such as the injection of
contrast media (dyes) into arteries or joints.  Nevertheless, there are
potential risks to the patient which should be recognized.  These include the
effects of electric currents, heat, and magnetic fields produced during the
procedure.  Patients who have had metallic surgical implants, such as a
pacemaker, are at particular risk.
     Despite these important concerns, MRI has shown remarkable advances
within the past years and its improvement is expected to continue.  Some
experts claim, in fact, that MRI may ultimately replace the more conventional
imaging techniques.  At present, however, it should be emphasized that MRI is
but one of many diagnostic tools available to the clinician.  A medical
history and physical exam, along with the use of other laboratory tests and
imaging techniques as well as MRI, are all   considered part of the ever
growing, complete diagnostic process.
ÿ
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The material contained here is "FOR INFORMATION ONLY" and should not replace 
the counsel and advice of your personal physician.  Promptly consulting your 
doctor is the best path to a quick and successful resolution of any medical 
problem.
