X-ray examination apparatus

Details X-ray examination apparatus X-ray examination apparatus

2007-08-21

2007-08-21

Thomas, Courtney (Department: 2882)

X-ray or gamma ray systems or devices

Electronic circuit

With switching means

C378S098800, C378S019000

Reexamination Certificate

active

10535058

ABSTRACT:
An x-ray examination apparatus comprises an x-ray source and an x-ray detector. The x-ray detector includes a photoconductor to derive electric charges from incident x-radiation and read-out elements which derive electrical pixel-signals from the electric charges from the photoconductor. A central group of the read-out elements is located in a central region of the x-ray detector and a peripheral group of the read-out elements is located in a peripheral region which surrounds the central region. The x-ray examination apparatus being provided with a selection system to select the central group of read-out elements so as to supply pixel-signals from the central group of read-elements to the output circuit. The selection system may include an encompassing electrode to drain electric charges from the peripheral group. Or the selection system shields the peripheral group from x-rays.

REFERENCES:
patent: 6262408 (2001-07-01), Izumi et al.
patent: 6724855 (2004-04-01), Sugawara et al.
patent: 2001/0005409 (2001-06-01), Gohno et al.
patent: 2002/0043696 (2002-04-01), Sarakinos et al.
patent: 2002/0181661 (2002-12-01), Vafi et al.

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