Can schizophrenia and personality disorders show up on a PET scan or CAT scan?

I am not talking about using them to diagnose it (i know psychiatrists don't use them to diagnose),but do changes in the brain show up on the scans to prove these disorders?

When a schizophrenic patient is experiencing psychotic forms some scans will show the abnormal brain activity show up (You can see some videos of this online and shots from the scan) Doctors have currently began to notice in the majority of schizophrenic patients doing things such as an MRI have began to notice physical abnormalities in the brain, some are VERY VERY VERY subtle and it is not know whether this is a cause or whether all patients have them as some are amazingly hard to find but they do seem to be present in a large majority of schizophrenic patients.
So there are things various scans can show us, some will show us abnormal brain activity some possibly related physical damage but that is about all it can show us. We don't how ever have anything that we can "Prove" I guess the abnormal brain activity would be classified as one, but that is a question of whether this abnormal brain thinking shows up in other forms of things, it could be due to something that is in schizophrenia and other mental illness.

BUT a scan is highly recommended, sometimes brain tumors cause schizophrenic like symptoms, so it may not prove schizophrenia but it sure does help knowing whether it is something else thats more deadly. Source(s): +Paranoid Schizophrenic+

They don't usually show up on a CT scan but yes they show up on a PET scan. Even something as simple as ADD shows up on a PET scan.
Nope only physical evidence shows on a PET scan not psychological.
yes they do, i learned about it in psychology...it show an abnormal brain wave on the tests
Schizophrenia may, but I doubt that personality disorders will unless they were triggered by TBI (traumatic brain injury). But even in that case, the scan would show the brain injury rather than the personality disorder. As far as I know, personality disorders are really hard to treat with medication since they are not organically caused.
Instruments which measure brain activity have shown in the past that those with mental/personality disorders have different sorts of brain activity than those without said disorders.

Taking pictures of one's brain however will not show any outward sign of personality disorder.