Warning - AGFA Drystar AXYS Manual

Performing the Weekly QC tests for general
radiography applications (DT 2 B and DT 2 C)
Spatial Resolution, Artifact Test and Low Contrast Visibility
To identify artifacts and verify spatial resolution you must perform the follow-
ing test weekly or as needed for troubleshooting image quality problems.
Procedure
1 First, print out the QC test image. Refer to
eral radiography applications (DT 2 B and DT 2 C)"
2 Check the QC test image visually for artifacts: no significant disturbing artifacts
should be visible.
3 Check the spatial resolution in each of the three circles (refer to item 1, 2 and 3
on the "QC test image for general radiography applications (DT 2 B and
DT 2 C)" on page 90). Within each circle there are three groups, each consisting
of five dots. All five dots of each group must be visible with a magnifying glass.
The smallest cluster of 5 dots is only visible if the viewing conditions are good.
4 Check the Low Contrast Visibility at both the high (100 / 95%) and low end
(0 / 5%) of the density scale. You should be able to see the circle in the square
(refer to item 1 on the
(DT 2 B and DT 2 C)"
"QC test image for general radiography applications (DT 2 B and DT 2 C)"
page 90).
5 Record these values on Chart 3 ('Drystar AXYS Artifacts and Spatial Resolution
Control Chart').
2852 A EN 20070205

WARNING:

Good viewing conditions are important for the correct
interpretation of both diagnostic and test images. Make sure that the light
box intensity (luminance) is between 2000 and 4000 cd/m² (4500 and
6500 °K). Use a magnifying glass and use shutters to collimate. Make sure
the ambient light is low.
"QC test image for general radiography applications
on page 90 and the upper circle (refer to item 2 on the
"Performing the daily QC test for gen-
on page 99.
D AXYS
RYSTAR
on
101