The continuing rapid expansion of neuroradiology, with new technologies and improvements in more well established techniques, have sharpened the tools with which to examine neurological and psychiatric diseases of old age. Investigation of, for example, the MRI findings in vascular dementia and depression, measurements of medial temporal lobe structures in Alzheimer’s disease, and functional imaging studies of schizophrenia, have led to new insights into the diagnosis, prognosis, and symptomatology of these ill understood diseases. However, there are two …