The Pilot Study of Medical Device-Neuclare for Patients With Mild Cognitive Disorder and Early Dementia

Inclusion Criteria: * Adults aged 55 to 90 * Patients who meet "Probable Alzheimer's disease" and "Diagnostic and Statistical Manual of Mental Disorders, 4th edition (DSM-IV)" criteria for dementia * Patients with CDR (clinical dementia rating) from 0.5 to 1 and MMSE-II over 18 * Upon hearing and fully understanding the detailed explanation of this clinical trial, a person who has voluntarily decided to participate and agreed in writing to comply with the precautions Exclusion Criteria: * Patient with pathological lesions in the brain identified by MRI * Patients with metabolic disorders such as thyroid dysfunction, hyperglycemia, hypoglycemia, liver or kidney dysfunction, and long-term use of drugs that will cause cognitive decline (e.g., anticholinergic drugs) * History of epileptic seizures or depression or psychiatric abnormalities or with visual acuity and fluctuations in cognitive decline * History of psychiatric disorder other than the inclusion criteria. * A person with a severe history of cancer/tuberculosis * A person who has or is taking psychiatric or peripheral/central nervous system drugs * A person who has contact dermatitis or sensitive skin abnormalities * Patients with a high fever of 40 degrees or higher based on eardrum body temperature * A person whose bleeding is identified within the last 3 months due to a common procedure/surgery that may affect vital signs * A person who is unable to perform MRI tests * Pregnant women * Patient with calcification in the brain identified by CT * Patient with allergic to contrast agents such as Definity or Gadovist * Other cases where the investigator judged that it is difficult to participate in the study;