Pennie & Edmonds LLP
Phosphors, and radiation detectors and X-ray CT unit made by using the same
A novel phosphor represented by the general formula(Gd1&#8722;xCex)3Al5&#8722;yGayO12(wherein x and y are values falling in the ranges of 0.0005&lE;x&lE;0.02, and 0<y<5.) was provided. The phosphor has a high luminous efficiency when Al and Ga are coexistent in the Gd-system phosphor. In particular, the phosphor with the Ga content (y) in the range of 2-3 has a luminous efficiency of twice the conventional phosphor. A radiation detector using this phosphor as ceramic scintillator is capable of obtaining a high luminous output and a very small afterglow.
Hitachi Medical Corporation
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Hiromichi Ichiro Motomichi Makoto Takaaki
Yamada Miura Doi Sato Kobiki