Device for measuring radiation intensity of small sealed radioactive source for cancer therapy

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.