Patent ID: 8093561
Filing Date: 2012-01-10
Classification: A61B

Abstract:
1. A thyroid radiation uptake measurement apparatus for measuring an uptake extent of a radioisotope in a thyroid by using a radiation detector to determine if the thyroid is abnormal, wherein the radiation detector comprises: a collimator which takes a pipe shape in such a manner that gamma rays emitted from the radioisotope taken in the thyroid are entered into the collimator; a scintillator provided within the collimator, which converts the gamma rays entered into the collimator into light according to an energy; a photomultiplier fitted in a trailing end portion of the collimator on the scintillator, and converts the light converted by the scintillator into electrical signals according to a light quantity; and a dose attenuation filter which is detachably provided at a leading end portion of the collimator, and attenuates an amount of the gamma rays entered into the collimator; wherein the dose attenuation filter comprises at least one metallic filter plate layered in a transmission direction of the gamma rays, and a thickness of the metallic filter plate is calculated by e