PROBLEM TO BE SOLVED: To provide a measurement system for gamma ray dose rate that increases convenience in use.;SOLUTION: A light shield device 100 filtrates light passing through the light shield device 100 by cutting off visible light. An electronic device 200 includes a detection module 201, an image analysis module 203, and a display module 204. The detection module 201 detects gamma rays and generates a current signal. The image analysis module 203 receives a current signal and analyzes the current signal, and then generates an analysis result including the total of gamma ray dose rates and a gamma ray energy spectrum. A display module 204 displays the analysis result.;COPYRIGHT: (C)2014,JPO&INPIT
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