Brachytherapy which is also called internal radiation therapy is one type of radiation therapy used to treat cancer by using a type of energy, called ionizing radiation, to kill cancer cells and shrink tumors. Brachytherapy involves placing a radioactive material directly inside or next to the tumor. Brachytherapy allows a physician to use a higher total dose of radiation to treat a smaller area and in a shorter time than is possible with external radiation treatment.
Treatment

Brachytherapy is used to treat cancers throughout the body, including the prostate, cervix ,head and neck , skin,
breast ,gallbladder, uterus ,vagina, lung ,rectum , eye etc.

Brachytherapy may be either temporary or permanent: In temporary brachytherapy, the radioactive material is placed inside or near a tumor for a specific amount of time and then withdrawn. Temporary brachytherapy can be administered at a low-dose rate (LDR) or high-dose rate (HDR).

Permanent brachytherapy, also called seed implantation, involves placing radioactive seeds or pellets (about the size of a grain of rice) in or near the tumor and leaving them there permanently. After several weeks or months, the radioactivity level of the implants eventually diminishes to nothing. The inactive seeds then remain in the body, with no lasting effect on the patient.


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