1. Brachytherapy
Medical radiation

2. Definition
a form of radiotherapy in which sealed sources of radioactive material are inserted temporarily into body cavities or directly into tumors.
procedure that involves placing high- powered radiation inside your body. Brachytherapy is one type of radiation therapy that's used to treat cancer. Brachytherapy is sometimes called internal radiation.

3. Overview
Brachytherapy allows doctors to deliver higher doses of radiation to more-specific areas of the body, compared with the conventional form of radiation therapy (external beam radiation) that projects radiation from a machine outside of your body.
Brachytherapy may cause fewer side effects than does external beam radiation, and the treatment time is usually shorter with brachytherapy.

4. Risk’s
Side effects of brachytherapy are specific to the area being treated. Because brachytherapy focuses radiation in a small treatment area, only that area is affected.
You may experience tenderness and swelling in the treatment area.

5. Preperation
Before you begin brachytherapy, you may meet with a doctor who specializes in treating cancer with radiation (radiation oncologist). You may also undergo scans to help your doctor determine your treatment plan.
Procedures such as X-rays or computerized tomography (CT) may be performed before brachytherapy.

6. Application of the radiation
A number of techniques are used for inserting the brachytherapy devices into body tissue. Your radiation therapy team may use needles or special applicators. These long, hollow tubes are loaded with the brachytherapy devices, such as seeds, and inserted into the tissue where the seeds are released. In some cases, narrow tubes (catheters) may be placed during surgery and later filled with radioactive material during brachytherapy sessions. CT scans, ultrasound or other imaging techniques may be used to guide the devices into place and to ensure they're positioned in the more effective locations.

7. Results
The doctor may recommend scans after brachytherapy to determine whether treatment was successful. What types of scans you undergo will depend on the type and location of your cancer.