Patent ID: 8476582

Claim:
A radiation intensity measuring apparatus for an encapsulated sealed radioactive source for brachytherapy adapted to measure radiation intensity of sources loaded in a cartridge, comprising: radiation intensity measuring means for measuring radiations emitted from the sources; holding means for holding the cartridge; and moving means for moving the holding means to the radiation intensity measuring means, wherein the radiation intensity measuring means comprises: a housing space in which the cartridge held by the holding means is brought; and a housing portion provided with a slit communicating between the housing space and an outside, the slit provided on the housing portion is formed so that a width thereof is narrower than a diameter of the sources, the holding means comprises: a holding mechanism for holding the cartridge so that an axial direction of the sources loaded in the cartridge is parallel to an axial direction of the slit, and the moving means comprises: a guide portion for guiding a movement of the holding means so that the holding means moves along a direction perpendicular to the axial direction of the slit; and a moving portion for moving the holding means so that the sources loaded in the cartridge pass through a position of the slit in the housing space of the housing portion.