Radiation therapy uses high energy X-radiation to destroy cancer cells. It uses a device called a linear accelerator that sends rays to the affected area only.

This lung cancer treatment is used sometimes as a primary or principal in patients who can not undergo surgery. In this case, is not to cure but slow the progression of the disease, although some exceptional cases come to heal without surgery, radiation therapy alone.

Radiation therapy to the lung is often used to relieve an airway obstruction leading to cancer.

When radiotherapy is used as a secondary treatment after surgery is primarily used to destroy cells that have not been removed.

Another use for which radiotherapy is used to relieve cancer-causing symptoms such as pain, difficulty swallowing, and so on.

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