A linear accelerator (LINAC) is the device most commonly used today for external beam radiation treatments.
Featuring radiation designed to kill cancer cells, this technology uses microwaves to accelerate electrons which collide into a heavy-metal target. This results in the emission of high-energy x-rays, a portion of which are formed into a beam that matches the shape, size and intensity needed to effectively treat cancerous tumors. Radiation specialists and therapists prescribe the appropriate treatment in volume and dosage, plus calculate the amount and time the accelerator will take to deliver the correct dose. To ensure safety, the patient environment is consistently monitored to measure radiation levels. In addition, the accelerator is calibrated and tested daily to ensure beam uniformity and intensity.