| 摘要 |
PURPOSE:To improve an S/N by reducing crosstalk, improving picture quality, and raising fluorescent absorbance by mounting a photodiode as a photoelectric conversion element on a scintillator plane without a shielding material. CONSTITUTION:A light signal made incident on the photodiode 8 as the photoelectric conversion element is taken out of a cable 9 as an electrical signal. A radiation shielding material 10 is inserted to reduce crosstalk phenomenon in which a large amount of X-rays are made incident on another scintillator. Shielding can be performed by the shielding material 10 increased by the share of photodiode 8 by providing the photodiode 8 on the plane of the scintillator 7 without the shielding material 10. Also, the shape of the scintillator 7 is formed almost in triangle prism, thereby, the contact area of the photodiode 8 and the volume of the scintillator 7 can be increased without changing the interval of the detector. Therefore, the light conversion efficiency and the photoelectric conversion efficiency of incident X-rays can be increased, and the S/N can be improved.
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