Early Identification of Patients Presenting a First Psychotic Episode, Non Answering to First Line Support Strategies

Inclusion Criteria: * men and women aged 18-35 years * member or beneficiary of a social security scheme, * for women, appropriate contraception will be mandatory, as well as a negative pregnancy test, * patients with a diagnosis of schizophrenia, schizoaffective disorder or schizophreniform disorder according to the DMS V * having never received anti-psychotic treatment, * followed in the hospital or outpatient, * having given their written informed consent, * that the physical examination revealed no significant clinical abnormalities Exclusion Criteria: * Female patients of childbearing period without effective contraception (oral, intramuscular hormonal, intrauterine device, or surgical); * Patients pregnant or nursing; * Presenting a serious somatic or neurological disease, especially Parkinson's disease, epilepsy, debilitating tardive dyskinesia, cardiovascular disease, severe liver or kidney; * Featuring against-indication for an MRI; including: metallic foreign body eye or intracranial, pacemaker, heart valve, surgical clips, claustrophobia, large tattoo in the upper part of the body, not compatible with 3T MRI * Having a history of alcohol or drug abuse in the past year; * Participating in another clinical trial or being in an exclusion period of the previous protocol; * Patients likely to exhibit aggressive behavior self according to the judgment of the investigators.