Could brain MRI scans an accurate evidence for typical mental illness such as dementia, schizophrenia?

Brain imaging scans. Are an impressive tool to help us identify certain anatomical lesions in the brain and can help us identify certain diseases, such as multiple sclerosis, tumors, large strokes, and subdural hematoma's. Some of those conditions can cause dementia. Most of the time an MRI or cat scan is used to rule out underlying reversible causes of dementia. A scan such as a pet scan can be a more sens tool.