Method for gain calibration of an X-ray imaging system, and...

Details Method for gain calibration of an X-ray imaging system, and... Method for gain calibration of an X-ray imaging system, and...

2008-07-22

2008-07-22

Porta, David P. (Department: 2884)

Radiant energy

Invisible radiant energy responsive electric signalling

Semiconductor system

C250S371000, C378S207000

Reexamination Certificate

active

07402812

ABSTRACT:
In order to increase the useful surface of an X-ray detector, in particular a flat image detector, a method is provided for gain calibration of an X-ray imaging system with a digital X-ray detector including an active matrix having pixel readout units. Pixels are read out from the pixel readout units, and a brightness drop below a defined threshold is determined for the read out pixels by an image processing unit. The pixel readout units having a brightness drop below the defined threshold are specified with regard to a cause of the brightness drop. Further, as a function of the specification, it is defined for which image raw values, subsequently read out from the affected pixel readout units, a gain correction is to be undertaken.

REFERENCES:
patent: 5818900 (1998-10-01), Vogelsong et al.
patent: 6350985 (2002-02-01), Rodricks et al.
patent: 6381374 (2002-04-01), Pourjavid
patent: 6471400 (2002-10-01), Simanovsky et al.
patent: 2005/0092909 (2005-05-01), Spahn
M. Spahn et al. Flachbilddetektoren in der Röntgendiagnostik, Radiologe 43, 2004, Seite 340-350.
Spahn, M. et al., “Flachbilddetektoren in der Röntgendiagnostik”, Radiologe, 2003, 43:340-350.

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