Brachytherapy

n. radiotherapy in which the radioactive material or the source of radiation is placed directly into or close to the body or tumor

Brachytherapy, also known as sealed source radiotherapy or endocurietherapy, is a form of  radiotherapy where a radioactive source is placed inside or next to the area requiring treatment. Conversely, external beam radiotherapy, or teletherapy, is the application of radiation that has been externally produced by a linear accelerator. Brachytherapy is commonly used to treat localized prostate cancer and cancers of the head and neck.
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Brachytherapy /brachy·ther·a·py/ treatment with ionizing radiation whose source is applied to the surface of the body or within the body a short [more]Brachytherapy - Community and Resources

[BRAKE-ih-THER-a-pee]
A procedure in which radioactive material sealed in needles, seeds, wires, or catheters is placed directly into or near a tumor. Also called internal radiation, implant radiation, or interstitial radiation therapy.  

Radiation treatment delivered by a small plaque sewn to the sclera.