| CPC A61B 6/037 (2013.01) [A61B 6/4241 (2013.01); A61B 6/5205 (2013.01)] | 10 Claims | 

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               1. A gamma ray probe capable of being inserted into the human body, the gamma ray probe comprising: 
            a collimator; 
                a scintillator array disposed on a rear of the collimator and configured to emit light photons in response to radiation passing through the collimator; 
                a light sensor module disposed on a rear of the scintillator array and configured to detect light photons emitted from the scintillator array and convert the light photons into an electrical signal; 
                a light guide part disposed between the scintillator array and the light sensor module and configured to guide light photons from the scintillator array to the light sensor module; and 
                a cylindrical probe casing accommodating the collimator, the scintillator array, the light sensor module, and the light guide part therein, 
                wherein the light guide part is made of a material that reacts to radiation and emits light photons, with the material having a characteristic different from a radiation response characteristic of the scintillator array. 
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