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Magnetic Resonance Imaging (MRI, MR, MRA)

Definition

Magnetic resonance imaging (MRI) is a technique that employs powerful magnetic fields and radio waves to produce detailed images of body structures. A magnet is used to polarize hydrogen atoms in the tissues after which the scanner monitors the resultant spinning energies of the atoms within the living cells.

What's it used for?

Images from MRI are often superior to those from CT scanning, particularly for soft tissues, brain, spinal cord, joints and the abdomen, and in certain conditions such as Multiple sclerosis. Using special techniques, MRI can also be used to visualize the blood vessels in isolation (Magnetic resonance angiography or MRA).

Preparation

Do not wear any makeup the day of the scan (some brands contain metal components).

Are there side effects?

MRI is a painless procedure with no side effects. Because it involves a magnetic field it can not be done on people who have any implanted devices such as a cardiac pacemaker, a cerebral aneurysm clip, a neurostimulator or an implanted hearing aid. If you have previously been a metal worker or exposed to flying metal  the presence of fragments or shrapnel in your body would have to be excluded for the MRI to be done. In addition, since the magnet is usually housed in a tube into which the patient is moved, persons subject to claustrophobia  or unable to lie flat for an extended period of time may not be able to tolerate a scan. 

Click on the thumbnail to the left to see a larger picture of a MRI scanner gantry. Click 'back' on your browser to return.

Where is it done?

There are currently seven government funded MRI scanners in the province. They are located at the hospitals listed below (by region). Click on a hospital name for more information (in adobe acrobat reader format- under construction) :

Private Scanners

In addition there are several private scanners, the costs of which are not covered by the Medical Services Plan. 

MRI Vancouver - Locations in Richmond, Vancouver and Capilano (North Shore)

Western Canada MRI Centre - City Square, Suite 145, 555 W 12th Ave, Vancouver, BC V5Z 3X7