Magnetic Resonance Imaging (MRI) of the Shoulder
How It Is Done continued...
If contrast material is needed, the
technologist will usually put it in through an IV in your arm or hand.
The injection may be given over 1 to 2 minutes.
may be put directly into your shoulder joint by the radiologist. Your doctor
will make your shoulder numb (local anesthetic) before putting in the
contrast material. Then more MRI scans are done for this part of the test. This
is called a magnetic resonance arthrogram.
An MRI test usually
takes 30 to 60 minutes but can take as long as 2 hours.
How It Feels
You won't have pain from the magnetic
field or radio waves used for the MRI test. The table you lie on may feel hard
and the room may be cool. You may be tired or sore from lying in one position
for a long time.
If a contrast material is used, you may feel some
coolness and flushing as it is put into your IV. You may have a squishy feeling
in your shoulder for 1 to 2 days from the material.
In rare cases,
you may feel:
There are no known harmful effects from the
strong magnetic field used for MRI. But the magnet is very powerful. The magnet
may affect pacemakers, artificial limbs, and other medical devices that contain
iron. The magnet will stop a watch that is close to the magnet. Any loose metal
object has the risk of causing damage if it gets pulled toward the strong
Metal parts in the eyes can damage the
retina. If you may have metal fragments in the eye, an
X-ray of the eyes may be done before the MRI. If metal is found, the MRI will
not be done.
Iron pigments in tattoos or tattooed eyeliner can
cause skin or eye irritation.