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BioI am the head of the Diagnostic Medical Physics group at Environmental Health and Safety department. Our group provides medical physics services for Stanford Health Care, Lucille Packard Children's Hospital, and Veterans Affairs Palo Alto Health Care System. The scope of our work includes:

• Radiation safety of X-ray imaging practice to ascertain the compliance of State and Federal regulations, The Joint Commission recommendations, requirements from related accreditation bodies and University policies

• Quality control program of X-ray imaging practice (Computed tomography, Interventional equipment, Fluoroscopy and Radiography) for Imaging and Interventional Services at hospitals

• Radiation dose monitoring and CT protocol optimization; Work with each clinical section on task-specific CT Dose and Image Quality optimization by utilizing our state-of-the-art CT equipment and novel iterative reconstruction techniques

• Review proposed research uses of x-rays in human subjects for Stanford IRB: evaluate doses and estimate risks and advise research investigators on radiation safety issues and how to solve related problems.

• Staff and trainee education on topics including CT technology, CT dose optimization, Fluoroscopy dose optimization, and radiation risk from ionizing imaging exams

• Clinical innovation: we work with physicians and hospital imaging and interventional teams on clinical research projects and activities that can be readily translated to patient care in Stanford affiliated health care systems