User Manual

4343W X-ray Detector
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REFERENCE MANUAL
The actual number of calibration frames used is determined by the system integrator depending
upon their specific performance requirements.
The general procedure for Gain calibration for all modes is described in Table 10. Detailed
instructions on performing gain calibrations are covered in the ViVA Online help
documentation.
Note
We recommend accumulating 32 frames for gain calibration and 8 frames for
offset calibration for optimal image quality.
Note
Gain Calibration should be performed at least once per year.
Table 10 Gain Calibration Sequence - All Modes
Action Results
Power On Power On the detector by inserting a battery. Once the detector is
powered on the detector is in low-power state. Wait 5 minutes prior to
Gain calibration.
Offset Calibration Software performs a new Offset calibration referred to as dark field
acquisition.
Note: X-rays must not be used for this part of the calibration.
Gain Calibration Multiple Gain frames taken. Software pauses at each frame so that the
operator can apply X-ray exposure. See Section 10.5.4.
Note: The exposure should ideally be at a level and technique
representative of the typical exposure dose for the
detector
during procedures.
Repeat The above procedure must be repeated for each of the stored imaging
modes.
Note
ViVA provides the convenience of automatically running Offset Calibration
as part of the Gain Calibration process.
However, API driven Gain Calibrations do not automatically run Offset
Calibration. OEM Applications should be sure to run Offset Calibration
prior to Gain Calibration.