On the 29th June 2004 I was a volunteer in an MRI (Magnetic Resonance Imaging) brain scanning study. The purpose of the study is to investigate new imaging techniques which are designed to improve the pictures of brain activation. A great deal can be learnt about how the brain works by looking at the blood flow to different parts of the brain whilst the brain performs different tasks.
The scanner uses a strong magnetic field to create detailed images of brain structure and function. By taking a series of images whilst the volunteer performs a task the researchers can build up a picture of the brain areas activated by this type of function. The scan does not involve any injections or X-rays.
However the scanner is very loud when it is taking images and earplugs and ear defenders are supplied to help block out some of the sound. Also, the MR environment is very confined and not suitable for anyone with claustrophobic tendencies. Otherwise MRI is generally considered to be a safe, non-invasive imaging technique. There are no known risks or side effects.
I was inside the scanner for just under 2 hours and scans of up to 15 minutes duration were ran with short breaks in between. By means of a small mirror above my face I was able to watch a DVD (”A Bug’s Life”) played on a PC and projected onto a screen behind the scanner. The audio track was played into my headphones but couldn’t be heard during the scans.