Morgan Department of Radiology and Radiological Science, Division of Magnetic Resonance (MR) Imaging. He specializes in magnetic resonance research and neuroradiology with an emphasis on stem and progenitor cell transplantation. Dr. Walczak received his MD in 2002 from the Medical University of Warsaw in Poland. He then completed a research fellowship in cell-based therapy for neurodegenerative disorders at the University of South Florida. After a fellowship in cellular imaging at Johns Hopkins University School of Medicine, Dr. Walczak joined the faculty of Johns Hopkins in 2008. He is an affiliated faculty member at the Kennedy Krieger Institute’s F.M. Kirby Research Center and the Institute for Cell Engineering.