Patent ID: 7573043

Claim:
A flat panel detector comprising a light-receiving element and provided thereon, a scintillator panel comprising a scintillator sheet having a phosphor layer provided on a substrate and provided thereon, a first protective film placed on the phosphor layer side and a second protective film placed on the substrate side to seal the scintillator sheet, wherein the light-receiving element is provided on the first protective film side of the scintillator panel, and the scintillator sheet is sealed with the first protective film and the second protective film at 5-8000 Pa, and wherein a surface of the first protective film brought into partial contact with the phosphor layer has a surface roughness Ra of 0.05-0.8 μm, and another surface of the first protective film brought into partial contact with a light receiving element plane has a surface roughness Ra of 0.05-0.8 μm, and air space portions each having a smaller refractive index than that of the first protective film, together with the partial contact, are provided between the first protective film and the phosphor layer, as well as between the first protective film and the light-receiving element plane.