Image-Guided Radiation Therapy

Because tumors can move or shrink between or during treatments, radiation oncologists use imaging technologies to keep track of a tumor’s precise position. With image-guided radiation therapy (IGRT), radiation oncologists can use a single machine that provides both daily imaging to adjust the shape and angle of radiation beams as well as the actual radiation treatment. The integrated imaging and radiation system enables patients to benefit from precise targeting with one machine.

For patients undergoing IGRT, we use x-rays, CT scans, or MRI imaging to set initial treatment parameters. Additional scans are then taken before each treatment to guide the daily positioning of radiation beams and to ensure the highest accuracy.

The Siteman Cancer Center offers four types of image-guided radiation therapy: