ENERGY-RESOLVED X-RAY IMAGE DETECTOR

An energy-resolved X-ray image detector includes a scintillation crystal layer, a photon detector layer and an optical layer. The scintillation crystal layer includes a plurality of scintillation crystals. The photon detector layer includes a plurality of photon detector elements. The optical layer is disposed between the scintillation crystal layer and the photon detector layer. The optical layer includes a plurality of optical elements having different light transmittances. The scintillation crystal is used for converting the X-ray beams into scintillation lights, and, when each scintillation light injects the corresponding optical elements, the light transmittances of the optical elements determine whether the scintillation lights can pass through the respective optical elements. The photon detection element then detects the scintillation lights passing through the corresponding optical elements to discriminate the energy of the X-ray beams.