Functional magnetic resonance imaging (fMRI) is a relatively new procedure that uses MR imaging to measure the tiny metabolic changes that take place in an active part of the brain.
A magnetic resonance imaging (MRI) scan is a painless procedure that lasts 15 to 90 minutes, depending on the size of the area being scanned and the number of images being taken.epending on the size of the area being scanned and how many images are taken, the whole procedure will take 15 to 90 minutes. The MRI scanner will make loud tapping noises at certain times during the procedure.
Here are typical timelines for your scan: MRI (magnetic resonance imaging) scan times will take 30 to 40 minutes for the majority of scans. That is, brain, knee, spine and shoulder. However, if the study requires a contrast agent your scan time can be 50-60 minutes. Prostate and breast MRI scans take 60 to 80 minutes.