Image-guided radiation therapy (IGRT) is a method of radiation therapy that incorporates imaging techniques during each treatment session.

Radiation therapy uses high-energy beams of radiation to control cancer and noncancerous tumors. By adding detailed images, IGRT ensures the powerful radiation is narrowly focused at the treatment area.

When undergoing IGRT, high-quality images are taken before each radiation therapy treatment session. IGRT may make it possible to use higher doses of radiation, which increases the probability of tumor control and typically results in shorter treatment schedules.

IGRT is the standard of care for radiation therapy treatment. It's used to treat all types of cancer.

Mayo Clinic's approach