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Azure 3131Z - 4131Z Reference Manual
13.0
Viva Pro Acquisition Settings
Adjusting the Viva Pro acquisition modes, systems settings, or to do any custom setups, please
see the Viva Pro Manual, applications documentation, or help files for further assistance. For
detector modes and corrections information,
page 24
of this manual.
Depending on the mode selected, the Acquisitions setting window displays the following
settings. You can find more information on these settings in the Viva Pro Manual
•
Fluro Corrections
•
Trigger selection — Internal/External
•
Frame Rate (if External Trigger is not selected)
•
Number of Buffers — If:
•
Continuous is not checked, indicates the number of frames to acquire. Acquisition stops
when the number of buffers is filled.
•
Continuous is checked - indicates the size of the circular buffer used during the
Continuous acquisition. Frames will be overwritten in the circular buffer as frames are
acquired.
•
Incoming Frame Display Interval — One for every frame, or even Nth incoming frame is
displayed.
•
Number of Calibration Frames — the number of frames to capture for offset or gain
calibration.
•
Offset Shift — adds a fixed value to every pixel.
13.1
Offset Calibration
Offset calibration compensates for fixed pattern pixel intensity variations in the image. Pixel
intensity variations are associated with dark current and electronic offsets. The offset reference
image is an average of a series of frames acquired without X-ray and is commonly referred to as
dark fields.
To perform an offset calibration with Viva Pro:
Click the Offset Calibration button
1
The Offset calibration will start automatically. Calibration files are automatically stored in
2
the detector and new calibrations overwrite the previously stored files.
Offset calibration should be performed for each operating mode.
3
see "Modes Of Operation and Corrections" on
.
www.vareximaging.com
17
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