Magnetic resonance imaging (MRI) combines an advanced computer system,
radio waves and a strong magnetic field rather than x-rays to provide remarkably
clear and detailed pictures of internal organs and tissues. It is one of
the safest, most comfortable imaging techniques available for the diagnosis
of a broad range of conditions in all parts of the body.
Overlake Hospital Medical Center Outpatient Imaging offers two types of MRI exams: high-field MRI
and large opening, short bore high-field open MRI. High-field MRI produces the highest quality images in
the shortest time, making it the system of choice whenever possible. To accommodate
larger individuals (up to 550 pounds), claustrophobic or special needs patients,
the large opening, short-bore MRI system uses a wide and short tunnel magnet that greatly reduces or removes the “tunnel effect."
An MRI exam is safe, simple and painless. However, please notify us for further
- You are pregnant or could be pregnant.
- You have a pacemaker, defibrillator, heart valve, cochlear implant
- You have a history of metal in the eyes.
Pacemakers, defibrillators and cochlear implants are contraindications
to MRI scanning due to the high magnetic field used.
Other implant devices such as hip or knee prosthesis, surgical clips or
pins and cardiac stents that have been in place for more than six weeks
pose no problem.
Some heart valves, aneurysm clips and neurostimulators are not safe. Bring
the implant certificate with you so the technologists can refer to the
manufacturer’s information about MRI compatibility.
Preparation for your procedure will depend on the type of MRI being done
and the body area being scanned. Specific preparations are listed below
with links to the MRI
Exam Guidelines for general procedural information.
Evaluates the liver, spleen, kidneys, adrenal glands and pancreas.
Evaluates the uterus, cervix and ovaries in women; evaluates the prostate,
bladder, penis and scrotum in men.
Assesses structures within the chest cavity, including the heart and lungs.
Chest MRI detects and stages cancer of the lungs, breast and other tissues.
It is also used to evaluate blood vessels and lymph nodes. A special
form of MRI called magnetic resonance angiography (MRA) can demonstrate
narrowing of the coronary arteries or an actual blockage by fatty deposits
or a blood clot, which often precedes clinical heart disease.
Assesses heart function and structure.
Evaluates brain function and abnormalities; used to diagnose stroke, tumor
or other neurological conditions.
|Lower Extremities MRI
Evaluates joints (such as knee, shoulder or ankle) and soft tissues to
detect ruptured ligaments, damaged cartilage or small fractures that
can't be seen on regular x-rays.