Magnetic Resonance Imaging (MRI) of the Head
An MRI can cause a burn with some
medicine patches. Be sure to tell your doctor if you are wearing a
There is a small chance of an allergic reaction
contrast material is used during the MRI. But most
reactions are mild and can be treated with medicine. Contrast material that contains gadolinium may cause a
serious problem (called nephrogenic systemic fibrosis) in people with
kidney failure. If you have decreased kidney function
or serious kidney disease, tell your doctor before having an MRI scan.
There also is a slight risk of an infection at the IV site if contrast
material was used.
Magnetic resonance imaging (MRI) is a test that uses a magnetic field and pulses of radio
wave energy to take pictures of the head.
radiologist may tell you some of the results of the
MRI right after the test. Full results are sent to your doctor or specialist in
1 to 2 days.
Magnetic resonance imaging (MRI) of the head
All structures of the head—the brain, its vessels,
spaces, nerves, and surrounding structures—are normal.
No abnormal growths, such as tumors, in or around the
brain are present.
No bleeding, abnormal blood vessels (AV malformations),
abnormal pockets of fluid, blockage in the flow of blood, or bulges in the
blood vessels (aneurysm) are present.
No signs of infection or inflammatory disease, such as
meningitis, are present.
Tumors in the brain or in areas outside the brain, such
acoustic neuroma, are present.
Bleeding or swelling (edema) in or around the brain is
Areas of infection or inflammatory disease, such as
encephalitis or meningitis, are present.
Abnormal areas in the brain may mean that certain
diseases, such as
Parkinson's disease, or
Alzheimer's disease, are present.
Bulges or weak areas (aneurysms) or abnormal blood
vessels (such as an AV malformation) are present.
What Affects the Test
Reasons you may not be able to
have the test or why the results may not be helpful include:
- Being pregnant. An MRI test is not usually done
during pregnancy even though the strong magnetic field is not known to be
- Having medical devices with metal. The MRI magnet may
cause these devices to not work right or to have problems during an MRI scan.
This test may not be done if you have:
- Being unable to lie still during the