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Radiation therapy works by damaging the DNA of cancerous cells, causing them to die or reproduce more slowly. A technique that was pioneered more than 100 years ago, the field has advanced tremendously in the past decade. New 3D imaging techniques, coupled with sophisticated planning software, have allowed radiation oncologists to localize and treat even small tumors with unprecedented accuracy.
While radiation therapy typically requires many brief incremental treatments, some patients may be candidates for stereotactic radiosurgery (also known as external beam radiation therapy) in which the radiation treatment is delivered in a single procedure.
