Method of correcting a radiation image for defects in the record

Details Method of correcting a radiation image for defects in the record Method of correcting a radiation image for defects in the record

1997-08-06

1998-11-03

Porta, David P.

X-ray or gamma ray systems or devices

Specific application

Absorption

250587, G01N 2304

Patent

active

058320555

ABSTRACT:
Method of correcting a radiation image for defects in the recording member. Defects in a member for recording a radiation image are corrected by generating a calibration matrix comprising for each pixel a correction value and by applying corresponding elements of the calibration matrix to the pixels of a recorded image. The values of the calibration matrix represent in each pixel the deviation of the value that is effectively obtained in a pixel when the recording member is subjected to a flat field exposure and the value that would be expected in the pixel. Different methods are described for determining the expected value in a pixel. Further, an overlay image is generated wherein local defects are visualised.

REFERENCES:
patent: 4611283 (1986-09-01), Lumelsky et al.
patent: 5151596 (1992-09-01), Saotome
patent: 5231574 (1993-07-01), Agano
patent: 5565678 (1996-10-01), Manian
patent: 5633510 (1997-05-01), Rogers

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