Magnetic Resonance Imaging (MRI)
An MRI is a very useful tool for physicians. It is a large imaging machine that utilizes magnetic fields and radio waves in order to construct an image of the brain. An MRI can produce an image of the brain and its inside portions. This technique allows physicians to see any unusual characteristics of your brain that may not be visible on the surface alone. In some instances, an MRI can be combined with an angiography (known as an MRA). An MRA allows physicians to view the blood vessels around the brain, rather than just the brain tissue. MRI’s are useful in detecting blockages, bleeding, or dead tissue that may be present in the brain. MRI’s are in many ways superior to CT scans, as they can develop higher resolution images and detect smaller and more subtle signs of a stroke that CT scans may not be able to detect.
When undergoing an MRI you will be asked to lie down and then will enter a large MRI machine. It is essential you lie as still as possible to prevent any obstruction of any images. The procedure may feel uneasy at times and promote claustrophobia due to its 15 minute – 1 hour length in time.