- Healthy controls： There is negative or a higher risk of suicide; Currently suffering from serious physical disease or central nervous system disease, substance abuse; Pregnant woman or woman who is ready to be pregnant, and lactating women; In presence of metallic implants: install pacemaker, intracranial silver clip, metal false teeth, stents, artery clamp, joints, metal fixed, or other metal implants in (this standard is limited to magnetic resonance imaging (MRI) detection).