imaging, including utilization and management of imaging resources, he has particular interest and expertise in issues related to the monitoring and control of medical radiation exposure, which can be compounded if testing is superfluous, unnecessary, or redundant.

Mythreyi Bhargavan Chatfield, Ph.D., is the director of data registries at the American College of Radiology (ACR) in Reston, Virginia. In this position, she manages national registries focused on improving practice quality in radiology. Dr. Chatfield’s current areas of focus include practice quality in radiology, performance metrics, and radiation doses from medical procedures. She is a council member of the National Council on Radiation Protection and Measurements (NCRP), an organization chartered by the U.S. Congress to develop expert consensus on issues related to radiation protection using independent scientific analysis. She has a Ph.D. in economics from Rutgers University.

Gwen Darien is a cancer survivor who brings a wealth of personal and professional experiences to her position as executive director of the Samuel Waxman Cancer Research Foundation. She was the founding director of the American Association for Cancer Research’s (AACR) department of Survivor and Patient Advocacy. Ms. Darien was editor-in-chief of CR magazine and director of the American Association for Cancer Research Survivor and Patient Advocacy Program. She was previously the editor-in-chief of MAMM. Ms. Darien is chair of the National Cancer Institute (NCI) Director’s Consumer Liaison Group and is a member of the Board of Directors of Education Network to Advance Cancer Clinical Trials. She has served as member of the Secretary’s Advisory Committee on Health, Genetics and Society and the faculties of the AACR/American Society of Clinical Oncology Methods in Clinical Cancer Research Workshop, Accelerating Anti-Cancer Agent Development and on the advisory board of the Health Advocacy Program at Sarah Lawrence College.

Kenneth Denison, Ph.D., is responsible for leading all dose-related activities for General Electric (GE) Healthcare’s CT business including lower-dose technologies, dose monitoring and tracking systems, new services and solutions, education and training, and coordination of industry, public, and government relations activities relative to the dose issue. His focus is on helping GE Healthcare customers worldwide lower the radiation doses used in their practices. He holds seven patents, all in the design of MRI systems. He received both his B.S. and Ph.D. degrees in chemical engineering from the University of Kentucky in Lexington.

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