X-ray detector and X-ray examination system utilizing fluorescen

Details X-ray detector and X-ray examination system utilizing fluorescen X-ray detector and X-ray examination system utilizing fluorescen

1992-06-19

1994-04-12

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

313543, H01J 4014

Patent

active

053028171

ABSTRACT:
An X-ray detector has a transmission type intensifying screen provided on the X-ray incident area of the detector body and a reflection type intensifying screen provided on the inner wall surface of the detector body except for the X-ray incident area. Visible rays from the transmission type intensifying screen and the reflection type intensifying screen are detected by a photomultiplier installed in the detector body. The transmission type intensifying screen and the reflection type intensifying screen use fluorescent materials such as Gd.sub.2 O.sub.2 S:Tb; Gd.sub.2 O.sub.2 S:Tb, Ce; GD.sub.2 O.sub.2 S:Tb, Yb; Gb.sub.2 O.sub.2 S:Pr; BaFCl:Eu; BaFBr:Eu; La.sub.2 O.sub.2 S:Tb; La.sub.2 O.sub.2 S:Tb, Ce; La.sub.2 O.sub.2 S:Tb, Yb; La.sub.2 O.sub.2 S:Pr; Y.sub.2 O.sub.2 S:Tb; Y.sub.2 O.sub.2 S:Tb, Ce; Y.sub.2 O.sub.2 S:Tb, Yb; and Y.sub.2 O.sub.2 S:Pr.

REFERENCES:
patent: 4054798 (1977-10-01), Watanabe et al.
patent: 4057508 (0000-01-01), Wolfe et al.
patent: 4263061 (1981-04-01), Fatuzzo et al.
patent: 4704538 (1987-11-01), Kitada
patent: 5022062 (1991-06-01), Annis
patent: 5126573 (1992-06-01), Knuepfer et al.
Search Report dated Jan. 21, 1993 for the corresponding European patent application.

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