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What
is MRI?
Magnetic Resonance Imaging, or MRI for short, is a
diagnostic tool that allows the physician to see pictures of the
inside of your body without surgery or the use of radiation. MRI
uses powerful, but harmless, magnetic fields and radio waves. This
combination of radiowaves and magnetic fields produces detailed
images of body structures such as the brain, the spine and other
vital organs. This technology enables a trained radiologist to see
the inner workings of the human body, and enables him/her to detect
developing diseases or abnormalities.
MRI is the method of choice for the diagnosis of many types of injuries
and conditions. MRI provides extraordinary detail and speedy diagnosis
- the clarity of the images enables swift and accurate diagnosis.
How
does MRI work?
MRI does not use radiation. Instead, it uses two forces that are
found everywhere in the world - magnetism and radio frequency waves
- to produce a diagnostic image.
By changing exam parameters, the MRI system can cause tissues in
the body to take on different appearances. This is very helpful
to the radiologist in determining if something seen is normal or
abnormal.
How
long will an MRI exam take?
An MRI examination usually takes between 30 and 60 minutes. The
time of the scan will vary, depending on the nature and extent of
the examination.
What
can I expect during the exam?
The MRI is one of the easiest and most comfortable exams. The technologist
will ask you to lie down on a cushioned table, which will automatically
move into the magnet after you are comfortably positioned for scanning.
The MRI technologist controls the MRI exam from a nearby workstation
console. The technologist watches you during the study and monitors
the progress of the image acquisition. During the MRI examination
you can communicate with the technologist at any time by using the
intercom.
When the MRI scan begins, you will hear a muffled thumping sound,
which will last for several minutes. Try to relax - bring your favorite
CD if you'd like. During the scan, it is important to lie still
because any movement during this time will blur the picture. When
the scan is complete, the technologist will return to assist you
off the table.
Do
I need a contrast injection?
A contrast injection is only given when the radiologist or your
physician has determined that it is necessary for diagnostic purposes.
Can
someone be with me?
Yes, you may have a friend or relative in the scanning room during
the examination because there is no radiation.
Your friend or relative will need to be pre-screened prior to entering
the scan room.
What
if I am claustrophobic?
Valley Radiology has both high-field and open scanners. Our open
scanners are designed to put our claustrophobic patients at ease.
You may want to ask your physician to prescribe a mild sedative.
Follow the instructions for usage. If you do take a sedative, you
will need to bring someone to drive you home after the exam.
What
happens after I am finished?
Your scan will be reviewed and interpreted by our board-certified
radiologist. The results will be sent to your physician, who will
discuss the results with you. Urgent findings will be called to
your doctor immediately.
Do
I need a referral for a MRI?
You will need a signed referral from your doctor to receive an MRI
exam.
Will
my insurance pay?
Most insurance carriers will cover the cost of the MRI scan, but
it is always advisable to check with your insurance carrier before
undergoing any medical procedure.
How
should I prepare for the MRI?
There is no special preparation required for the MRI exam. You may
eat normally and go about your daily routine. Continue to take your
medication, unless otherwise advised by your physician. It is advisable
to wear comfortable clothing. Because of the magnetic field you
will be asked to leave the following items in a safe place:
-
Jewelry - Watches
-
Pagers - Cell Phones
-
Credit Cards
- Hearing
Aids - Eyeglasses
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Coins - Keys
-
Any other metal objects
Are
there any contraindications for MRI?
The following are definite contraindications for MRI:
-
Cardiac Pacemaker
-
Cochlear Implant
-
Foreign Bodies in the Eye
If
you have any other implants or conditions, please check with your
doctor or call our Center, and the technician will be happy to consult
with you regarding your questions or concerns.
What
is an MRA?
MRA (MR angiography) is a MRI study of the blood vessels. It utilizes
MRI technology to diagnose blood vessel disease. MRA/MRI has the
same preparation and precautions.
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