| US 7,538,330 B2 | ||
| Radiation detection apparatus and scintillator panel | ||
| Keiichi Nomura, Honjo (Japan); Kazumi Nagano, Fujisawa (Japan); Yoshihiro Ogawa, Hachioji (Japan); and Satoshi Okada, Zama (Japan) | ||
| Assigned to Canon Kabushiki Kaisha, Tokyo (Japan) | ||
| Filed on Mar. 01, 2007, as Appl. No. 11/680,736. | ||
| Claims priority of application No. 2006-056472 (JP), filed on Mar. 02, 2006; application No. 2006-056474 (JP), filed on Mar. 02, 2006; application No. 2006-203161 (JP), filed on Jul. 26, 2006; and application No. 2007-046715 (JP), filed on Feb. 27, 2007. | ||
| Prior Publication US 2008/0083877 A1, Apr. 10, 2008 | ||
| Int. Cl. G01T 1/20 (2006.01); G01T 1/202 (2006.01) | ||
| U.S. Cl. 250—370.11 [250/367; 250/486.1; 250/487.1] | 19 Claims |
| 1. A radiation detection apparatus, comprising:
an optical detector having a substrate and a plurality of photoelectric conversion elements arranged, on the substrate, for
converting incident light into an electric signal; and
a scintillator layer disposed on the optical detector and having a columnar crystal structure which converts radiation into
light,
wherein the concentration of an activator in the scintillator layer is higher at a radiation-incident side opposite the optical
detector and is lower at the optical detector side, and
wherein the concentration of the activator of the scintillator layer is not less than 0.7 mol % at the incident side of the
radiation, and is not less than 0.3 mol % at the optical detector side and lower than the concentration at the incident side
of the radiation.
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