AGFA DRY 3.4 User Manual page 93

These charts will be used for the annual quality test.
4. Save this film for future reference.
Related Links
Charts for general radiography QC
Performing the Annual QC tests for general radiography applications
97
Verifying Acceptable Spatial Resolution, Artifact Levels and Low
Contrast Visibility for general radiography applications
To verify acceptable spatial resolution, artifact levels and low contrast
visibility, proceed as follows:
1. Print the QC general radiography test image or use the previously printed
QC general radiography test image used to establish the daily operating
density levels.
2. Visually check the QC general radiography test image for artifacts: no
significant disturbing artifacts should be visible.
3. Check the spatial resolution in each of the three ovals. Within each oval
there are three groups, each having 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 'QC general radiography test image') and
the upper circle (refer to item 2 on the 'QC general radiography test image').
5. Record these values at the top of Chart 3 ('Artifacts and Spatial Resolution
Control Chart').
6. These charts will be used for the weekly quality test.
Related Links
Establishing the image geometry reference values for general radiography
applications
DRY 3.4 | Advanced Operation (key-operator mode) | 93
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) for general radiography. Use a
magnifying glass and use shutters to collimate. Make sure the
ambient light is low.
WARNING:
In case of significant artifacts or insufficient spatial
resolution, the cause must be found and the problem solved
before any further clinical films can be printed. If the
problem cannot be solved, call your local service
organization.
on page 92
on page 130
on page
2602A EN 20191018 0826