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Radiation Therapy Overview
A Guide to What Radiation Therapy Is And How It Works To Fight Cancer

By , About.com Guide

Updated: July 08, 2009

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Photo Courtesy of the National Cancer Institute
Radiation therapy is the use of high energy radiation to kill cancer cells and shrink tumors. It is the most commonly used method of cancer treatment and is recommended for for many types of cancer, but not all.

Specific Radiation Treatment Information:

How is Radiation Given?

Radiation is given two ways: internal radiation (brachytherapy) and external radiation (systemic).

Internal radiation uses radiation that is placed very close to the tumor site. The source is the radiation is placed in a small container, called an implant.If surgery has been done and cancer cells are still present, it is usually placed at the incision site.

External radiation is done on an outpatient basis at a hospital. A large machine is used to point radiation at the cancer and possibly surrounding tissues.

Side Effects of Radiation Therapy


Side effects vary among treatment plans. Only a physician will be able to provide side effect expectations because it really does vary among treatment. However, the most common side effects experienced during radiation therapy are:

  • fatigue

  • changes of the skin

  • loss of appetite

The Costs of Radiation Therapy

Radiation can be expensive, depending on the amount of treatments a person needs and how often it is given. The cost is high because of the machinery itself and the amount of specially trained professional needed to given the treatment.

It is covered by Medicaid in most states and is covered under Medicare, Part B.

Most private insurances cover radiation therapy. Check with your provider about what is covered.

Each clinic or hospital has a financial specialist on staff that can help determine the costs and means to pay. This should all be discussed prior to treatment.

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