This invention provides a radiation intensity measurement device for cancer treating brachytherapy that can efficiently and promptly measure a plurality of cartridges, which is device for measuring the radiation intensity of a plurality of sources S in a state where the plurality of sources S are filled in a seed cartridge SC of a cartridge C, which comprises: a holding means 10 for holding the plurality of cartridges C a radiation intensity measurement means 30 for measuring the radiation intensity released from the plurality of sources S and a moving means 20 enabling the radiation intensity measurement means 30 to close and leave relative to the holding means 10 wherein, the radiation intensity measurement means 30 has: a sensor 31 for measuring radiation intensity, and a shielding member 35 having a slot 35h provided for limiting the radiation irradiated to the sensor 31, and the moving means 20, in a measurement state, is constituted to enable the radiation intensity measurement means 30 to relatively move along the direction the plurality of sources arranged.本發明提供一種可效率良好地迅速測量複數個源匣之癌治療用密封小線源的放射線強度測量裝置,其係以複數個線源S充填在源匣C的源種匣SC中之狀態測量複數個線源S的放射線強度之裝置,其具備有:可保持複數個源匣C之保持手段10;測量從複數個線源S放出的放射線強度之放射線強度測量手段30;以及使放射線強度測量手段30相對於保持手段10而接近離開之移動手段20;其中,放射線強度測量手段30具有:測量放射線強度之感測器31、以及具有為了限制照射至感測器31之放射線而設置的狹縫35h之遮蔽構件35,移動手段20係構成為可在測量狀態下使放射線強度測量手段30沿著排列有複數個線源S的方向相對地移動。1h‧‧‧測量空間2‧‧‧底座11‧‧‧框架部11a‧‧‧腳部11b‧‧‧保持部21‧‧‧移動框架22‧‧‧x方向移動機構22a‧‧‧齒條22b‧‧‧軌道22m‧‧‧x方向驅動馬達22p‧‧‧小齒輪22s‧‧‧滑塊23‧‧‧y方向移動機構23a‧‧‧螺桿軸23b‧‧‧導軸23m‧‧‧y方向驅動馬達25‧‧‧控制部30‧‧‧放射線強度測量手段31‧‧‧感測器31a‧‧‧檢測部32‧‧‧感測器保持部35‧‧‧遮蔽構件
