Patent ID: 8502134
Filing Date: 2013-08-06
Classification: G01T

Abstract:
1. A radiation measurement instrument calibration facility capable of lowering scattered radiation and background radiation, adapted to be disposed inside a laboratory, the facility comprising: a shielding device, for shielding the scattered radiation and background radiation inside the laboratory, being configured with an inlet, an outlet and a cavity in a manner that the inlet, the outlet and the cavity are arranged in communication with each other while the to-be-calibrated instrument being placed in the cavity and the cavity being in communication with two openings formed respectively on two sides of the shielding device that are perpendicular to the inlet and the outlet; an electric door unit, for positioning the shielding device and the to-be-calibrated instrument as well as controlling the movement of two door panels for enabling the two to wall the two openings of the shielding device; a control unit, for controlling the operation of the electric door unit in a remote manner; a multi-source irradiator, configured with several radiation sources of different intensity, capable of emitting a primary radiation beam while allowing the radiation intensity of the same to be variable according to the radiation source that is selected from the irradiator for the emission; a collimator, for controlling the radiation field size of the primary radiation beam while enabling the primary radiation beam to travel into the shielding device through the inlet and out of the same through the outlet; a carrier, for carrying the shielding device and the electric door unit while adjusting the levels of the two; and a radiation baffle, for reducing the amount of background radiation entering the shielding device through the outlet.