What is
MRI (Magnetic Resonance imaging)?
MRI is a noninvasive medical test helping physicians to diagnose and treat many
medical conditions.
MRI uses a magnetic field and a computer for producing detailed pictures of
organs, soft tissues, bone and many internal Body structures. The images can
then be examined on a computer monitor, transmitted electronically, printed or
copied to a CD. MRI does not use ionizing radiation (x-rays), so no hazards of
radiation in this study.
Any preparations needed?
- Instructions regarding eating
and drinking before an MRI exam vary with each exam.
- The radiologist or technologist
may ask you about having allergies of any kind, such as allergy to drugs, contrast
material, food, the environment, or Asthma.
- The radiologist should know if
you have any serious health problems, or if you had any surgery before.
- Women should always inform their
physician or technologist if there is any possibility that they are
pregnant (although MRI has not been proven to be harmful in pregnancy).
- If you have claustrophobia (fear
of enclosed spaces) or anxiety, you may want to ask for anesthesia prior
to the scheduled Examination.
- Some items should be left at
home if possible, or removed prior to the MRI scan. For example:
- watches, credit cards, jewelry and hearing aids
( all of which can be damaged).
- Any metallic items can distort
MRI images.
- Removable dental work.
- Eyeglasses.
- The following implants should
not enter the MRI scanning area (unless explicitly instructed to do so by
a radiologist who is aware of the presence of any of the following):
- Internal (implanted)
defibrillator or pacemaker
- Cochlear (ear) implant
- Some types of metal coils
placed within blood vessels
- You should tell the radiologist
or the technologist if you have any devices inserted in your body, because
some of them may interfere with the exam or cause a risk, Depending on
their nature and the strength of the MRI magnet. For example:
- Implanted cardiac pacemaker
- Artificial heart valves
- Implanted drug infusion ports
- Implanted nerve stimulators
- Artificial limbs or metallic
joint prostheses
- Metal pins, screws, plates,
stents or surgical staples
- Artificial joints or patients
who might have metal objects in certain parts of their bodies may require
the use of another imaging procedure before MRI, for example: x-ray may be
taken to detect and identify any metal objects.
- Parents who accompany children
into the MRI room also need to remove metal objects and to tell the
technologist about any medical or electronic devices They may have.
- Infants and young children may
require sedation or anesthesia to complete an MRI exam without moving for
better images quality.