Dr. Mitchell joined CEP in 2007 as a Research Analyst.  His prior experience in health technology assessment includes eleven years as a research analyst with ECRI, the nation’s leading independent health technology assessment institute; and two years managing a research consultancy, Diagnostic Research Design & Reporting (dr2).  He was ECRI’s specialist in evaluation of imaging and diagnostic technologies, serving as lead analyst for 25 full TA reports and nearly 300 short-form reports.  He is a member of Health Technology Assessment International, the Association of University Radiologists, the Radiology Alliance for Health Services Research, and the International Society for Pharmacoeconomics and Outcomes Research. 
Dr. Mitchell has served as consultant on screening and diagnostic tests to the Institute of Medicine, the Veterans’ Healthcare Administration, and the UK National Health Service; and he has given TA training programs for ECRI, the International Society for Technology Assessment in Health Care, and the Centers for Medicare & Medicaid Services.  For non-clinicians, Dr. Mitchell taught a four-week layman’s course on medical decision making and the health care system.  His teaching experience also includes five years on the Diagnostic Imaging faculty of Thomas Jefferson University. 
Dr. Mitchell’s research career began in the laboratories of Nobel laureate Paul Lauterbur, and continued at the Pendergrass Radiology Labs of the University of Pennsylvania.  There he conducted the first quantitative clinical trial of MRI for diagnosis of any condition, and developed methods for the technical evaluation of MR systems.  His doctorate, from the Perelman School of Medicine, is in biophysics.  His dissertation research was in the use of deuterium MR to measure tissue perfusion.  His undergraduate education was at Haverford College. 
Dr. Mitchell’s current research interests are in methods for systematic review of diagnostic tests, with summary ROC meta-analysis a particular interest.  He has also done research on the quality of published diagnostic clinical studies, and compiled a concordance of study quality indicators used in various quality checklists.  He is the developer of the dr-ROC summary ROC software package.
Dr. Mitchell resides with his family in Glenside, PA, where he keeps in shape as a hockey referee and youth soccer coach.