Magnetic Resonance Imaging (MRI) of the Head Magnetic resonance
imaging (MRI) is a test that uses a magnetic field and pulses of
radio wave energy to take pictures of the head. In many cases,
MRI gives information that cannot be seen on an X-ray,
ultrasound, or computed tomography (CT) scan. For an MRI of the
head, you lie with your head inside a special machine (scanner)
that has a strong magnet. The MRI can show tissue damage or
disease, such as infection, inflammation, or a tumor.
Information from an MRI can be saved and stored on a computer
for more study. Photographs or films of certain views can also
be made. See MRI images of a person who has had a stroke or a
seizure. In some cases, a dye (contrast material) may be used
during the MRI to show pictures of structures more clearly. The
dye may help show blood flow, look for some types of tumors, and
show areas of inflammation. MRI of the head may be used to look
for the cause of headaches. For more information, see: Health
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