IIRC, functional / structural scanning needs more than an fMRI such as a PET and a CT with contrast. Source: I know a guy who worked on Alzheimer's and they co

IIRC, functional / structural scanning needs more than an fMRI such as a PET and a CT with contrast. Source: I know a guy who worked on Alzheimer's and they combined several radiology sources to form a composite brain scan to study structure.