Functional magnetic resonance imaging (fMRI) is a neuroimaging tool that uses a powerful magnet to measure brain activity. Specifically, it detects the changes in blood oxygenation levels that result from regions of the brain consuming energy.
fMRI is a safe technology — since our bodies are not metallic, magnets do not do any harm to us. Whereas X-rays use harmful ionizing radiation, fMRI is completely safe and can be used repeatedly. Indeed, this technology has been safely used for over two decades, including with children, infants, and fetuses.
Like other safe technologies, we need to take precautions to ensure safety, like how a seat belt is needed to safely use a high chair. You and your child will be screened prior to undergoing an fMRI scan in order to check that you two don’t have any implanted metals (e.g., a pacemaker) or any metal on you (e.g., jewelry) that would be affected by the magnet. Also, the fMRI machine makes a lot of noise when it is turned on, so we will provide you and your child with hearing protection.
Before you and your child participate, we will host a 1-on-1 orientation session, which will give us the opportunity to explain more about fMRI, what it is you will do, and what you can expect. You will also have a chance to ask our research team any questions you have.