Non-invasive Transcranial Focused Low-intensity Ultrasound Stimulation in Patients With Mild Lewy Body Dementia

Inclusion Criteria: * Male or female DLB patients between the ages of 50-85; * The psychological evaluation was in accordance with MMSE score of 18-24 (including 18 and 24) and CDR score of 0.5. * Can cooperate to complete clinical research. Exclusion Criteria: * There is a definite history of cerebrovascular stroke, and there are definite symptoms or signs of neurological deficit at the time of onset, and there are corresponding responsible lesions left by neuroimaging。 * Those who have a history of alcoholism, or drug addiction, or neurological diseases such as brain trauma, epilepsy, encephalitis, normal intracranial pressure hydrocephalus, etc. that can cause cognitive impairment. * Suffering from systemic diseases that may lead to cognitive impairment (such as liver and kidney insufficiency, endocrine diseases, vitamin deficiency). * Have a history of using antipsychotics for more than five years before diagnosis. * There are contraindications for head MRI examination.