Matrix of image brightness detector's elements formed by differe

Details Matrix of image brightness detector's elements formed by differe Matrix of image brightness detector's elements formed by differe

1991-09-03

1992-11-17

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

378 99, 358111, H01J 4014

Patent

active

051645831

ABSTRACT:
A detector for the image brightness which is present at the output screen of an x-ray image intensifier is formed by a combination of individual detector elements, the detector elements having different shapes and/or sizes. The detector elements in combination form a matrix which enables an optimum selection of a desired measurement field by selecting defined combinations of individual detector elements.

REFERENCES:
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patent: 4639943 (1987-01-01), Heinze et al.
patent: 4809309 (1989-02-01), Beekmans
patent: 4891844 (1990-01-01), Riri
patent: 4982418 (1991-01-01), Kuehnel
patent: 5029338 (1991-07-01), Aichinger et al.
"A Photodiode Array X-ray Imaging Syste, For Digital Angiography," Cunningham et al. Med. Phys. vol. 11 No. 3 May/Jun. 1984, pp. 303-309.

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