Magnetic Resonance Imaging (MRI)
What is magnetic resonance imaging?
Magnetic resonance imaging (MRI) produces detailed images of the body using a very strong magnet and radio waves. It does not use radiation. The part of the body being examined is centred inside a tunnel that creates a magnetic field. Since our bodies are mostly made up of water, when we lie down in a strong magnetic field, the hydrogen atoms in the water “line up” with the magnetic field, much like a compass pointing north. Radio waves cause the atoms to emit signals that a computer will measure and create pictures of the body part being examined.
While MRIs are generally safe, the magnet used during the test means people with certain implanted devices, such as pacemakers or cochlear implants, may not be able to have the test. Alternative imaging should be discussed with your doctor.
Getting an MRI: what to expect
Preparing for the test
On the day of the test
During the test
After the test
Location and contact
Magnetic Resonance Imaging (MRI)
Sunnybrook Health Sciences Centre
2075 Bayview Avenue,
A-wing, ground floor, room AG 256
Toronto, ON M4N 3M5
Phone: 416-480-4336
MRI services are available at our Bayview Campus by pre-scheduled appointment only.
