Why do I have to have another CT scan before starting radiation?

Most patients have a CT before starting radiation treatments as part of the simulation procedure. The scan utilizes a low radiation dose protocol and often does not involve contrast in the bloodstream. Another scan is obtained as the body’s position for radiation treatment is different than the position for diagnostic scans. Also, the radiation oncologist is present during this procedure to assist with your positioning and any other procedures necessary for planning your course of radiation.