Plesiotherapy (original) (raw)

Plesiotherapy is a radiation therapy modality in which a source of ionizing radiation is placed in contact with the exterior surface of the body. This is as distinguished from teletherapy in which radiation is projected by the source from a distance, from brachytherapy in which one or more sealed sources of radiation are placed inside the body, and from radiopharmaceutical therapy in which a source is introduced into the body, but that source is unsealed.