User Manual

4343W X-ray Detector
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REFERENCE MANUAL
10.5 X-ray Detector Calibration
X-ray Detector calibration files are stored inside the detector non-volatile memory. There are
three calibration files per mode: offset, gain, and defects. The calibration files are used for
corrections during image acquisition.
10.5.1 Offset Calibration
Offset calibration compensates for fixed pattern pixel intensity variations in the image associated
with the dark current and electronic offsets. The Offset reference image is an average of a series
of frames acquired without X-ray and referred to as dark fields. Prior to acquiring images, an
offset calibration must be performed in each mode. The Offset calibration file created by this
calibration is used by the corrections module to correct the preview image.
• Offset calibration should not be performed during X-ray.
• The X-ray to digital conversion factor does not change because of calibration.
10.5.2 Offset Calibration Steps
ViVA can be used to run the calibration process.
1 Choose the desired mode from the Mode Drop Down Menu.
Figure 20 Mode Drop Down Menu
Note
After a calibration, ensure the new calibration files are used by closing and
re-opening the link to the X-ray Detector.