PIXIUM STATIC X-Ray Flat Panel Detectors - End User Manual
Document reference : 63137046 -
January 2024
Page 40
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11.7.X-RAY Calibration
For a given Detector Mode, the PixRad API needs at least one Gain Reference and one Defect Map.
These two reference files are created during the X-ray Calibration process and saved in the Reference directory.
An ID number identifies the gain and defect map reference files.
The Gain Reference takes into account either the response of the detector and the uniformity of the X-ray flow. Therefore,
for a given Detector Mode, it could be necessary to have several Gain References to cover different X-ray configurations
(different SID, grid and no grid, X-ray source orientation …).
Only one Defect Map per Detector Mode is requested as it depends only on the detector performance.
The dark references cannot be shared between a rad mode and a rad.autotrigger mode using
the same detector mode. Therefore, the dark calibration for rad and rad.autotrigger operating
modes must be done separately.
The PIXIUM EZ-C HD includes an automatic dark calibration. No manual dark calibration is
needed
The center of the detector active area must be aligned with the center of the X-ray beam during
the X-ray calibration. This procedure is not described in the present document.
Take care that no object is present in the X-ray beam between the source and the detector (no
object, collimator well opened…) during calibration.
The detector must remain stable during the calibration.
An optimal image quality is ensured only if the temperature gap between calibration and images
shots is within the distance to calibration temperature values defined in the technical
specification.
The detector must be calibrated after its installation and at least every 12 months.
After each calibration, the image quality must be verified at system level before operational use.
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