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Radiation therapy also called radiotherapy, is a form of cancer treatment that makes use of high doses of radiation to kill cancerous cells. High-energy particles or waves, such as x-rays, gamma rays, electron beams, or protons are used in radiation therapy to destroy cancer cells.
The treatment works by damaging cells by destroying the genetic material that controls the growth of cells. Unlike chemotherapy, radiation therapy is a localized treatment. This means that only those areas containing cancerous cells are targetted during the treatment. Healthy cells nearby which may be affected by radiation often repair themselves.
How is radiation therapy used?
Radiation therapy can be used in the treatment of any type of cancer. It may be also useful in treating noncancerous tumors as well. Radiation therapy may be included in your treatment plan in any of the following ways:
How is radiation therapy carried out?
Before undergoing radiation therapy, your medical team will carry out a planning process which includes:
After the planning process, your specialist will determine the type and dosage of radiation to be administered.
Radiation therapy can be given in one of the following three ways depending on the kind of cancer and where it is. In some cases, more than one type may be used.
What are the risks involved in radiation therapy?
Some people experience few side effects or none at all from radiation therapy. Others may experience more severe side effects. Some of the side effects to be expected include:
Most side effects are temporary and subside once the treatment is over.
Periodic scans are necessary after the treatment to see how your body is responding to the treatment. In some cases, the response to treatment is immediate whereas in other cases it may take a longer time to see results.