Brains scans were first used in the 1970s when CT (computed tomography) scans began to be used to look at the structure of the brain and other parts of the body. Now there are many types of scans available and they have transformed medicine. Brain scans are accurate and non invasive and have been shown to be a cost-effective imaging tool for a wide range of clinical problems. But why are brain scans done? What types of scans are there? Are they painful? These and other frequently asked...