Christopher J. Tien, PhD, DABR, FAAPM

Dr. Christopher J. Tien is an Associate Professor and Lead Brachytherapy Physicist in the department of Therapeutic Radiology. In addition to his appointments at Yale, Dr. Tien is an Adjunct Associate Professor at Brown University.

Dr. Tien practiced at a community hospital in suburban Chicago for 3 years after completing his residency at Brown University/ Rhode Island Hospital. He completed his PhD by the time he was 25 years old from the University of Florida on a full fellowship following his accelerated 5-year combined Master's & Bachelor's Degrees in Nuclear Engineering and Radiological Sciences obtained summa cum laude at the University of Michigan.

Clinically, he is a board-certified therapeutic medical physicist appointed as a Medical Physicist at Yale-New Haven Hospital. His current translational research is largely inspired by his clinical duties in brachytherapy (gynecological, prostate, ocular, and skin) applications and radiobiological modeling.

In 2024, Dr. Tien was elected as a Fellow of the American Association of Physicists in Medicine (AAPM), making him one of the youngest elected Fellows in the AAPM's 66 year history. With AAPM, he is currently the chair of the national AAPM Task Group on high-dose-rate brachytherapy (TG59). He has served terms on the national AAPM Board of Directors and as the president of the Connecticut chapter of AAPM. He is a member of the national AAPM Medical Physics Education Subcommittee and ABS National Education Subcommittee.

Dr. Tien is a full member of the American Brachytherapy Society (ABS), the American Society for Radiation Oncology, and the Yale Cancer Center.