Radiation therapy

Radiation therapy uses high doses of radiation to shrink tumors and stop cancer from spreading. Radiation is a form of energy that interferes with cancer cells’ ability to grow. Our specialists deliver precise treatments that destroy cancer while protecting nearby healthy tissue.

There are two types of radiation therapy:

  1. External beam radiation uses special technology to send radiation to the tumor from outside your body.
  2. Internal radiation places safe levels of a radioactive substance inside the body, right near the tumor.

What you should know about radiation therapy

  • You can see doctors specializing in radiation therapy (radiation oncologists) in Geisinger locations throughout the region.
  • Some of our radiation oncologists specialize in specific cancers, including prostate cancer and bladder cancer.

Why choose Geisinger for your radiation therapy?

  • Safety: Our team includes dedicated radiation physicists who help doctors plan your treatment. Physicists calculate the dose of radiation that’s best for the type of cancer and size of the tumor. Physicists also determine the precise position of the beams so you can get the most out of each treatment.
  • Latest treatments: Geisinger offers the latest treatments, including intensity-modulated radiation therapy (IMRT). This treatment uses higher doses of radiation than traditional radiation therapy treatments, with fewer side effects. As the beams pass over the tumor, we change (modulate) their intensity to concentrate their effect on the tumor. IMRT may be right for you if the tumor has an irregular shape or you have head and neck cancer.
  • Focus on your quality of life: If you have prostate cancer, we use a simple device (rectal spacer) to protect the rectum during treatment. The spacer lowers the risk for problems controlling your bowel movements (incontinence) after treatment. We are one of the only programs in the region where rectal spacers are available. Find out more about prostate cancer care.

Treats these conditions

Radiation therapy at Geisinger includes care and the latest technologies to help shrink tumors and prevent them from coming back.

Specialties and institutes

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