V.腔内治療装置の機構(高線量率腔内治療時の技術的諸問題)

抄録

Enploying a small amount of Radium-226 or Cesium-137 source was to be used hitherto for the treatment of carcinoma of the uterine cervix in used After-loading tachniques. It was involves, however, radiation risk to the staff and patient. The long treatment time are also a pain (strain) on the patient. In recent years, we have developed a remote control after-loading unit, which was named as RALSTRON, which was complete eliminated the disadvantage of conventional radium therapy. This unit also has disadvantage, however, that the design for the remote after-loader for intracavitary applicators present considerable difficulties, because many sources of different active lengths and loading patterns are rquired. A solution solution to this problem was caried out by using small point source, placed in Tanden applicator, of high activity and moving them back slowly during the treatment. Recently, this unit was installed many haspitals about 80 units in Japan, and are used. In this paper are given about an mechanism and safety devices of this unit.