McLaren Cancer Institute locations offer state-of-the-art integrated radiation oncology technology. Using powerful Varian Trilogy linear accelerators, world-class radiation oncologists provide a wide array of innovative treatment therapies. These include: Intensity Modulation Radiation Therapy (IMRT) including Tomotherapy, Image Guided Radiotherapy (IGRT), On Board Imaging CT Scanner (OBI), Stereotactic Radio Surgery (SRS), and Stereotactic Body Radio Therapy (SBRT). The Trilogy system also offers a respiratory gating function that monitors and maps tumor motion due to breathing. It compensates for the movement so the beam turns on only when the tumor is in the beam. CT simulators with moving lasers and 4D imaging capabilities help oncologists deliver the most precise treatments to each patient. In addition to external beam radiation therapy, radiation oncologists perform high dose rate (HDR) brachytherapy, prostate seed implants, and radioimmunotherapy.