The Medical Physics Section of the Department of Radiation Oncology at the Medical College of Wisconsin consists of 17 physicists, 10 dosimetrists, 8 postdoctoral research fellows, 4 physics residents and other supporting staff. X. Allen Li, PhD, is the Chief Physicist. The physics faculty, staff and residents are employees of the Medical College of Wisconsin while the dosimetrists are employed by Froedtert Health.

Clinical activities performed by the Physics Section include machine QA and treatment planning as well as development, implementation, and support for specific procedures such as imaging, image-guided RT (IGRT), intensity modulated RT (IMRT), stereotactic body RT (SBRT), 4D/gated RT, brachytherapy, and TomoTherapy. Research activities include developing strategies and tools for adaptive RT, biological/functional image-guided RT, RT outcome modeling, biologically based treatment planning, and strategies to manage respiratory motion.