How does an MRI Work?
Magnetic Resonance Imaging uses magnets and sound waves
to pass through tissue layers and distinguish one from another
in very small increments to produce many data points which
are then saved. These layers are then combined in computers
to produce high quality images of the body known as an MRI.
What are MRI's Used For?
They are mainly used to diagnose injuries in the soft tissues
like cartilage in joints, torn ligaments and muscles. They are
also commonly used to diagnose problems with the circulatory
system including the heart, veins and arteries. MRI's are well
suited for examining the organs inside a patients chest and
abdomen to produce high quality images of the lungs, kidneys,
liver, spleen and pancreas. Since MRI's emit no radiation,
they are the preferred method for examining the brain and
reproductive systems and are able to give clear images for the
most accurate diagnosis.
What Will I Experience During an MRI?
The time it takes to get an MRI done varies depending on
how many image sequences must be taken, with each one
lasting up to 15 minutes. Typically there are two to six
image sequences taken and this allows for patients to be
discharged in a timely manner.
Patients who have pacemakers, brain and spinal stimulators and
inner ear implants should avoid receiving an MRI because of the
effect that the magnet could have on them.
