A Study to Compare Two Different Brain Imaging Techniques in Healthy Volunteers and in Schizophrenic Patients

Exclusion Criteria

• •Have received other antipsychotic during the last month or neuroleptics during the last year.
• •If you have taken part in investigations you should not receive a radiation dose of more than 10 mSv over any 3 year period.
• •History of bleeding disorder or are taking medication that affects blood clotting
• •History of substance dependence (except nicotine)
• •Claustrophobia
• •Gross head deformity.
• •Unable to lie still in the PET or SPECT camera for 1 hour and a half.
• •The presence of a cardiac pacemaker or other electronic device or ferromagnetic metal foreign bodies.