August 4, 2011—The first multi-institutional study evaluating a new form of radiation treatment for prostate cancer coupled with sophisticated real-time tumor tracking is now underway at the University of Michigan Health System in Ann Arbor, Mich. Principal investigator Daniel A. Hamstra, Ph.D., M.D., assistant professor, department of radiation oncology, along with 10 co-investigators, are evaluating the safety of shortened (hypofractionated) stereotactic body radiation therapy (SBRT) with Calypso Medical’s GPS for the Body technology, used for real-time tracking of cancerous tumors during prostate radiotherapy, and comparing it to conventional radiation treatment.