Patent ID: 8841621

Claim:
A radiographic imaging apparatus comprising: a scintillator that comprises a columnar crystal and converts irradiated radiation into light; and a sensor substrate that comprises a light receiving element that receives light emitted from the scintillator and converts the received light into an electric signal, a cross-sectional diameter of a columnar portion of the columnar crystal in a region located at a sensor substrate side being larger than that in a region located at a side opposite to the sensor substrate side, the columnar portion excluding a pointed tip end of the columnar crystal, wherein the radiographic imaging apparatus further comprises a non-columnar crystal region at the sensor substrate side of the columnar crystal; the radiographic imaging apparatus satisfies 0.1 μm≦T≦3×D μm, wherein T represents a thickness of the non-columnar crystal region, and D represents an average cross-sectional diameter of the columnar crystal; and the radiographic imaging apparatus receives radiation that is incident from the sensor substrate side, and wherein a maximum cross-sectional diameter of the columnar crystal in a region from an interface between the columnar crystal and the non-columnar crystal region to a portion at a height of 50% of the thickness of the columnar crystal portion is larger than an average diameter of the columnar crystal at the interface; and an average diameter of the columnar crystal in a region from a tip end of the columnar crystal to a portion at the height of 50% of the thickness of the columnar crystal portion is smaller than the maximum cross-sectional diameter of the columnar crystal in a region from an interface between the columnar crystal and the non-columnar crystal region to a portion at the height of 50% of the thickness of the columnar crystal portion.