External beam therapy is a method for delivering a beam of high-energy x-rays to a tumor. The beam is generated by a linear accelerator and is targeted at the tumor site. These high energy x-rays can deposit their dose to the area of the tumor to destroy the cancer cells and, with careful treatment planning, spare the surrounding normal tissues.
Willis-Knighton performs External Beam Radiation Therapy (EBRT) using several different machines. Our Varian 21-EX linear accelerators were the first in the area to perform Image Guided Radiation Therapy (IGRT). IGRT allows your physician and therapist better visualization to ensure proper alignment and targeting of your tumor. EBRT is also performed using TomoTherapy, which is CT guided Intensity Modulated Radiation Therapy (IMRT). This allows for not only accurate tumor targeting, but delivers even less radiation to healthy tissues in particularly sensitive regions of the body. Willis-Knighton’s radiation oncologists are nationally and internationally known as leaders in the use of TomoTherapy.