Faxitron CT Specimen Radiography System User Guide
Chapter 5: Calibration
5081-9544 Revision 004 Page 41
window, press the physical Stop button on the system control panel, or press the Stop
button in the control panel touch screen.
5.2 Geometric Calibration
Geometric Calibration ensures the system is set up correctly to perform the highly precise
reconstruction of the CT images (3D). This can be performed at any time to ensure image
quality but must be conducted at least every 3 months.
If the 3D image quality degrades at any time, i.e., rings visible in the image, conduct a
geometric calibration.
Click on the Calibrate button in the Home Menu then select Geometric Calibration in
the Calibration Menu. A Geometric Calibration Instruction Dialog will open.
Figure 36: Geometric Calibration Instruction Dialog
The Geometric Calibration utilizes a white Geometric Calibration Phantom. The bottom
of the phantom has a flat cut into it which matches the recess in the CT pedestal. This
recess ensures the phantom is properly positioned and prevents it from shifting during
calibration.
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