Precise Intervention Technology and Application of Low Intensity TUS on Negative Symptoms of Schizophrenia

This study uses low-intensity ultrasound waves applied to the brain (transcranial ultrasound stimulation) to treat the "negative symptoms" of schizophrenia — things like emotional flatness, lack of motivation, and social withdrawal — that medications often don't fully address. **You may be eligible if...** - You have a diagnosis of schizophrenia or schizoaffective disorder - You are between 18 and 50 years old and right-handed - You are currently on stable antipsychotic medication (second-generation) - You have noticeable negative symptoms such as emotional flatness or lack of motivation **You may NOT be eligible if...** - You do not have a schizophrenia spectrum diagnosis - You are left-handed - You have unstable symptoms or are not on a stable medication regimen Talk to your doctor to see if this trial is right for you.