Dr. Jiadi Xu is an Associate Professor in the Johns Hopkins Medicine Department of Radiology and Radiological Science. Dr. Xu is a MR physicist who has been working in the NMR/MRI technical development. He has successfully designed and implemented new NMR/MRI pulse sequences for a variety of biological systems, ranging from small metabolites and membrane proteins to animal with human disease models. His current research focuses on the technical development and applications of chemical exchange saturation transfer (CEST) MRI for monitoring tissue metabolism and arterial spin labeling MRI techniques (ASL) for mapping vasculature. Once developed, these technologies are made available to others for applications such as ischemia, cancer and neurodegeneration.