A medical linear accelerator (LINAC) customizes high energy x-rays or electrons to conform to a tumor’s shape and destroy cancer cells while sparing surrounding normal tissue. It features several built-in safety measures to ensure that it will deliver the dose as prescribed and is routinely checked by a medical physicist to ensure it is working properly. If you’re scheduled for radiation therapy using a LINAC, your radiation oncologist will collaborate with a radiation dosimetrist and a medical physicist to develop a treatment plan for you. They will double-check this plan before treatment begins and implement quality assurance procedures to ensure that each treatment is delivered in the exact same manner.