Dr. Ronald C. Petersen, a leading expert in the field of Alzheimer’s disease research, will present the first Robert N. Butler Memorial Lecture, Neuroimaging and Biomarkers: How Early Can We Diagnose Alzheimer’s? The special lecture, part of the prestigious NIH Director’s Wednesday Afternoon Lecture Series, honors NIA’s founding director, who was among the first to warn about the impact that Alzheimer’s disease would have on our aging population.