MRI Brain Mackay is a safe and
painless test that uses a magnetic field and radio waves to produce detailed
images of the brain and the brain stem. These detailed images can detect a variety
of conditions of the brain like tumors, cysts, bleeding, and swelling,
including structural abnormalities, infections, and damage caused by injuries
or a stroke.
This is
different from a CT scan (also called a CAT scan) because it does not use
radiation.
The
radio waves manipulate the position of the atoms and the signal is sent to a
computer which results in clear, cross-sectional black and white images and can
be converted into three-dimensional pictures. This helps pinpoint problems in
the brain for medical authorities to analyze.
Evaluating problems
The
scan on the brain is useful in evaluating problems like persistent headaches,
dizziness, weakness, blurry visions, and seizures. It can help detect chronic
diseases of the nervous system like multiple sclerosis, for instance.
In
certain cases, MRI can produce clear images of brain parts not seen as well when
using X-ray, CAT scan or ultrasound. This is particularly helpful in diagnosing
problems of the pituitary gland and the brain stem.
Procedure
Brain
scans do not require special preparation. Technicians, however, will need to
make the patient remove any objects containing metal (eyeglasses, jewelry and
the like). They are also instructed to make sure there are no internal metal
clips or the like from previous surgeries as these might cause a problem near a
strong magnetic field.
If it
is a child, you need to instruct them to be still during the scan. For babies
and young kids, sedation are sometimes administered to keep them still, especially
those having trouble relaxing in a closed space.
Contrast solutions
To
detect particular problems, a child may be given a painless contrast solution
which works to highlight certain areas so doctors can see more detail in
specific areas, unless your child is allergic to such solutions.
The MRI
of the brain usually lasts from 30 to 45 minutes. Sedation wears off in one to
two hours and the contract solutions given should pass through the body in
about 24 hours.
Results
The MRI
scan is painless, and your child can immediately return to normal routines and
diet after the scan.
The
images produced by the MRI are then viewed by a radiologist specially trained
in interpreting these scans. The radiologist will then send a report to the
attending doctor and discuss these with the patients concerned. Typically,
these results cannot be given directly to the patients or family. (Results are
immediately available only in emergency cases.)
Risks
As they
are, MRIs are safe and no health risks had been associated with the magnetic
field or the radio waves used. The waves
are low-energy waves and there is no radiation. The process can be repeated
without any side effects.
If the
patient (especially children) have allergies which might be caused by the
contrast solution, or if the child is uncomfortable with sedation, there is
need to discuss this with the attending physician on the risks and benefits of
such actions needed in an MRI procedure.
