Given that my father has not responded to Levodopa, the last Neuro we have seen suggested a scan of the head to determine the areas in the brain at play in my father's case. Unlike most cases of parkinsonism, my father had a catastrophic head injury in 2002 which has directly led to his parkinsonian symptoms, but there is debate as to whether my father has a form of parkinsonism or something else. A scan of the brain has been suggested to get a better idea of the condition, although it was not indicated whether it should be a CT scan or an MRI scan. Does anyone know the difference, and maybe suggest which one we should be seeking? Thanks Robert ---------------------------------------------------------------------- To sign-off Parkinsn send a message to: mailto:[log in to unmask] In the body of the message put: signoff parkinsn