The purpose of this study is to determine the safety and initial efficacy of Transcranial Electromagnetic Treatment (TEMT) in patients with mild/moderate Alzheimer's Disease. Throughout a 2-month treatment period, patients will be evaluated for cognitive performance, brain energy utilization, functional brain imaging, and blood/cerebrospinal fluid (CSF) markers for Alzheimer's Disease. Since all patients will receive TEMT, each patient's baseline measurements will serve as their own control for any treatment effects.