Antonelli, Terry, Stout & Kraus, LLP
Phosphor, radiation detector containing the same, and X-ray CT apparatus
A novel phosphor represented by the general formula(Gd1-y-zCeyScz)3Al5-dGadO12 (wherein y, z and d are values falling in the ranges of 0.0005&lE;y&lE;0.05, 0<z&lE;0.03 and 0<d<5) is provided by adding scandium (Sc) to a phosphor represented by the general formula of (Gd1-yCey)3Al5-dGadO12 (wherein y and d are values falling in the ranges of 0.0005&lE;y&lE;0.02 and 0<d<5). The phosphor has a high luminous efficiency and a very small afterglow. A radiation detector using this phosphor as ceramic scintillator is capable of obtaining a high luminous output and suitable for a radiation detector of X-ray CT because of its high luminous output and a very small afterglow.
Hitachi Medical Corporation
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Hiromichi Ichiro Makoto Takaaki Tsuneyuki Minoru
Yamada Miura Sato Kobiki Kanai Yoshida