Patent ID: 9638808
Date: 2017-05-02
CPC Classifications: G01T

Claim:
1. A radiation detector comprising: a scintillator having scintillation counter crystals for converting radiation into fluorescence being arranged in a matrix and having a first layer, a second layer, a third layer, and a fourth layer in a height direction; a light detector optically connected to the scintillator, the scintillator further comprising: a plurality of reflectors that reflects fluorescence, the reflectors including two types arranged in each of the first layer, second layer, third layer and further layer, a first type of the reflectors extending horizontally and a second type of the reflectors extending vertically, wherein the first type of the reflectors in the first layer and the second layer are arranged vertically at intervals by one scintillation counter crystal to appear alternately in the first layer and the second layer, the first type of the reflectors in the second layer and the third layer are arranged vertically at intervals by one scintillation counter crystal to appear alternately in the second layer and the third layer, the first type of the reflectors in the third layer and the fourth layer are arranged vertically at intervals by one scintillation counter crystal to appear alternately in the third layer and the fourth layer, the second type of the reflectors in the first layer and the second layer are arranged horizontally at intervals by two scintillation counter crystals to appear at an equal position in the first layer and the second layer, the second type of the reflectors in the second layer and the third layer are arranged horizontally at intervals by one scintillation counter crystal to appear alternately in the second layer and the third layer, the second type of the reflectors in the third layer and the fourth layer are arranged horizontally at intervals by two scintillation counter crystals to appear at an equal position in the third layer and the fourth layer, and wherein the scintillation counter crystals each have side faces opposite to one or more adjacent scintillation counter crystals, and the side faces are each a rough ground glass surface rougher than a ground smooth surface.