Appendix: Possible Reasons For A Failed Shading Calibration - AGFA CR Series Service Manual

DD+DIS155.11E
2.5

Appendix: Possible Reasons for a failed Shading Calibration

There are following main reasons for a failed shading calibration:

Particles in the optical path  Use the cleaning brush to clean the optical path.
For instructions refer to the digitizer user manual.

Contamination and/or any defects on the image plate  Clean the image plate
according to the cleaning procedure or use another image plate.

Cassette wrong exposed (too high / low dose)  Check exposure parameters.

Cassette not exposed on its entire area (wrong collimation)  Ensure the
cassette is entirely exposed.

PMT exposed to intensive light before calibration (in this case PMT has lower
sensitivity)  wait until the PMT has back the normal sensitivity (time depends
on duration and brightness of the light exposure).
The controlled version of this document is available from the Agfa HealthCare Library. Any printed copy of this document is uncontrolled.
Edition 1, Revision 1
03-2013
DOCUMENT CONTROL NOTE:
CR 10-X / CR Reader / CR 12-X / CR Advanced Reader Chapter 3.6 / Page 10 of 10
Type 5151 / 100 / 110 / 200 / 210
Repair and Service
Adjustments and Calibrations
Agfa Company Confidential