Psychoradiology is a newly emerging filed describes the application of the neuroimaging techniques in analysing psychiatric conditions. Previously in psychiatry only gross structural abnormalities, that might cause psychosis, could be detected. Neuroimaging was used to detect and to differentiate depression from neurodegenerative disorders or brain tumours. Recently, functional neuroimaging, mostly in the form of functional magnetic resonance imaging, molecular neuroimaging with positron-emission tomography or single photon emission tomography, facilitates the identification of therapeutic targets, the determination of the dose of a new drug needed to occupy its target in the brain, following up the effect of the treatment and the selection of patients for clinical trials.