Dr. Tracey Schefter is a board certified (in both Canada and the US) radiation oncologist. Dr. Schefter received her undergraduate engineering degree from The Royal Military College of Canada (1985-1989) and her medical degree from Queen's University in Kingston, Ontario, Canada (1990-1994). Residency training in radiation oncology was completed at the Princess Margaret Hospital in Toronto, Canada (1994-1999). She initiated a residency training program at the University of Colorado Denver (UCD) and was the program director from 2003 through 2007. She is the director of the Stereotactic Body Radiation Therapy (SBRT) program and the radiation oncologist involved in the delivery of Selective Internal Radiation Therapy (SIRT) for liver tumors using sir spheres and theraspheres. She is the principle investigator on numerous clinical trials including 2 national cooperative group trials (RTOG cervical and ACOSOG esophageal). Her main areas of expertise are gynecological (GYN) and gastrointestinal (GI) cancers. She organizes twice a monthly a multidisciplinary GI tumor clinic. She serves on several national committees including but not limited to RTOG gynecologic tumor committee, ACOSOG radiation, and ASTRO emerging technologies. She has contributed to more than 50 publications. She is an ad hoc reviewer for the Journal of Clinical Oncology and the International Journal of Radiation Oncology biology physics. She is an exercise enthusiast/competitor and recently became a yoga instructor and is developing trials to determine the impact of yoga on quality of life for cancer patients.