CENTER JIG OF GAMMA-RAY IRRADIATION APPARATUS FOR CALIBRATION

摘要

The present invention relates to a centering jig of a gamma-ray irradiation measuring apparatus that can accurately identify and calibrate a concentric circle between an irradiation portion and a phantom portion and a vertical state by the centering jig, thereby precisely measuring the irradiation by the irradiation measuring apparatus and thus improving the reliability of the radiation measurement. The centering jig includes: a fixing portion (10) fixed to one side of an irradiation portion (110); a zero setting portion (20) provided at a center of the fixing portion (10) and irradiating a laser beam to identify whether a center line of the phantom portion (120) coincides; an expandable portion (30) provided at one end of the fixing portion (10), of which the length is expanded according to an interval between the irradiation portion (110) and the phantom portion (120); and a rotation portion (40) provided on an end of the expandable portion (30) and configured to rotate at a given angle in a state in which one end is brought into contact with one end of the phantom portion (120), thereby identifying and calibrating the vertical state of the phantom portion (120).