KaVo 3D eXam, Operator'S Manual

Page: 101 / 170

k990400 September 19, 2007
Calibration and Quality Assurance
10-11
22. Adjust Brightness and Contrast level for the best image quality.
Evaluate the image.
Line Pair - Line Pairs consists of a resolution of 10 lines per cm
(5 dark wish 5 light). Line Pairs 10 through 16 are displayed in
image (shown above).
Picture depicts expected appearance of the Line Pairs per cm
present within the QA Phantom.
23. Verify that definition is present within line pairs 10, 11, and 12.
Compare your image quality to the image shown above. Your
Line Pair #12 should have the same image quality (definition) as
the #13 Line Pair displayed above or better.
Distance Measurement Test
To ensure measurement accuracy, this procedure checks Distance
measurements.
24. Right click view and select Distance .
25. Drag the Distance cursor to draw a line from the outside line of
set 16 to the outside line of set 10, as shown above.
26. The measurement (displayed in upper corner of image) should
be between 41 and 42 mm.
27. Call Service, if the measured value is not within this range.
Distance Line