The Division of Medical Physics of the Department of Radiation Oncology provides clinical physics services for Duke University Medical Center and 5 affiliated treatment facilities. A full range of radiation therapy treatments includes three-dimensional conformal radiotherapy, intensity-modulated radiation therapy, image-guided radiation therapy, stereotactic radiosurgery, stereotactic body radiation therapy, 4-dimensional treatment, total-body photon irradiation, total skin electron irradiation, high-dose rate brachytherapy, prostate seeded implant, and other low-dose rate brachytherapy, and hyperthermia. In addition, our physics faculty have active research projects involving intensity-modulated radiation therapy, image-guided radiation therapy, oncological imaging, 3-dimensional dose measurement, physical and biological modeling of tumor and normal tissue dose responses, hyperthermia, 3-dimensional tumor imaging, methodology development for 4-dimensional simulation to 4-dimensional verification, device design, and engineering. The physics faculty are also involved in teaching activities for radiation oncology residents and graduate students in Medical Physics. The Division consists of 15 physicists, 10 dosimetrists, 2 computer specialists, 2 engineers, and 5 research associates, headed by Dr. Fang-Fang Yin, Professor and Director of Radiation Physics.