Correction of fixed pattern noise

Details Correction of fixed pattern noise Correction of fixed pattern noise

1999-09-27

2000-07-11

Porta, David P.

X-ray or gamma ray systems or devices

Accessory

Testing or calibration

378 988, 250214VT, H01J 3100

Patent

active

060862521

ABSTRACT:
An X-ray image intensifier (1) includes an entrance screen (2) with a photocathode (3). A television camera (15) is optically coupled to the exit window (12) of the X-ray image intensifier. The X-ray image intensifier with the television camera derives a primary image signal form an X-ray image on the entrance screen. The X-ray image intensifier is provided with a radiation source (4), such as flashlights or LEDs, for irradiating the photocathode (3). Irradiation of the photocathode produces a light intensity distribution on the exit window wherefrom the television camera derives a control signal. Correction numbers are derived from the signal levels of the control signal. These correction numbers are employed for correcting the primary image signal.

REFERENCES:
patent: 2929935 (1960-03-01), Lempert
patent: 3201630 (1965-08-01), Orthuber et al.
patent: 3345534 (1967-10-01), Charles
patent: 3365577 (1968-01-01), Teeg et al.
patent: 4134010 (1979-01-01), Eberhardt
patent: 5020085 (1991-05-01), Kawara et al.
patent: 5031620 (1991-07-01), Oe
patent: 5452338 (1995-09-01), Granfors et al.

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