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Radiation can be given from the outside (using a linear accelerator) called external beam irradiation and then supplemented with internal radiation, where a tube is inserted into the uterus (called a tandem) and often tubes in the corners of the vagina (called ovoids.) The tubes are loaded with radioactive Cesium and left in place for 48 - 72 hours. A picture of the tandem and ovoids are shown here. For a more complete explanation of internal radiation go here.
A picture of a typical radiation field (or portal) for external beam is shown here. Fields wide enough to include lymph nodes are shown from the front, more front, front, side, more side and side# 2 more GOG ports
Additional information about treating lymph nodes, using radiation after surgery, combining radiation with chemotherapy, the proper dose, and the outcome are as noted.
