Robert H. Mach, PhD, is the Britton Chance Professor of Radiology and director of the PET Radiochemistry Program at the University of Pennsylvania. His research interests include the development of radiotracers for imaging CNS receptors, cell proliferation, mechanisms of cell death, alpha-synuclein aggregation in Lewy bodies and Lewy neurites, and the role of oxidative stress in neurodegeneration. He has over 190 peer-reviewed publications and 10 book chapters, and holds 20 patents on the development of PET-based radiotracers. He currently has six different PET radiotracers being evaluated in Phase 0 / Phase 1 clinical trials.