Magnetic Resonance Imaging (MRI)
How It Feels
You will not 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.
In rare cases,
you may feel:
- A tingling feeling in the mouth if you have
metal dental fillings.
- Warmth in the area being examined. This is
normal. Tell the technologist if you have nausea, vomiting, headache,
dizziness, pain, burning, or breathing problems.
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 or injury if it gets pulled toward the
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.
An MRI can cause a burn with some
medication patches. Be sure to tell your health professional if you are wearing
There is a slight risk of an
allergic reaction if contrast material is used during
the MRI. But most reactions are mild and can be treated using medicine. There
also is a slight risk of an infection at the IV site.
magnetic resonance imaging (MRI) is a test that uses a
magnetic field and pulses of radio wave energy to make pictures of organs and
structures inside the body.
radiologist may discuss initial results of the MRI
with you right after the test. Complete results are usually ready for your
doctor in 1 to 2 days.
An MRI can sometimes find a problem in a
tissue or organ even when the size and shape of the tissue or organ looks
Magnetic resonance imaging (MRI)
| Normal: |
The organs, blood vessels, bones, and
joints are normal in size, shape, appearance, and location.
No abnormal growths, such as tumors, are
No bleeding, abnormal fluid, blockage in
the flow of blood, or bulges in the blood vessels (aneurysms) are
No signs of inflammation or infection are
| Abnormal: |
An organ is too large, too small, damaged,
Abnormal growths (such as tumors) are
Abnormal fluid from a cause such as
bleeding or an infection is present. Fluid is found around the lungs or heart.
Fluid is found around the liver, bowel, or other organ in the
A blood vessel is narrowed or blocked. An
aneurysm is present.
Blockage in the gallbladder
bile ducts or in the tubes (ureters) that
lead out of the kidneys is present.
cartilage is seen. Bones are broken or show infection
Problems of the nervous system are present,
multiple sclerosis (MS),
Alzheimer's disease, or