Image Guided Radiation Therapy (IGRT)
Image Guided Radiation Therapy (IGRT) is the use of frequent imaging during a course of radiation therapy to improve the precision and accuracy of the delivery of radiation.
In IGRT, machines that deliver radiation, such as a linear accelerators, are equipped with imaging technology so that the physician can image the tumor immediately before or even during the time radiation is delivered and while the patient is on the treatment table.
Any necessary adjustments are then made to the patient’s position so that the target is centered in the radiation beam. IGRT allows more precise targeting of the tumor, and minimizes radiation dose to surrounding tissue.