KaVo 3D eXam, Operator'S Manual

Page: 109 / 170

k990400 September 19, 2007
Calibration and Quality Assurance
10-19
The HU Area (box size) should be approximately 400.0 mm
2
.
20. Note and record the Mean and SD values of the four regions. See
chart below.
21. After recording values, a fifth ROI is required from the center
of the water area . The fifth measurement replaces the first
measurement, since four measurements is the limit.
22. Note and record the Mean and SD values of the center ROI.
23. Subtract the lowest Mean Value from the highest Mean Value .
If the remainder is greater than 100 , call Service.
Measured
Values
Upper
Left
Upper
Right
Lower
Left
Lower
Right Center
Mean
SD