151
2900H EN 20071108
Advanced operation (Key-operator mode)
D
RYSTAR
5500/5503 R
EFERENCE
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
following test weekly or as needed for troubleshooting image quality
problems.
1
First, print out the QC general radiography test image. Refer to
daily QC test for general radiography applications (DT 2 B and DT 2 C)’
on
page
.
2
Check the QC general radiography test image visually for artifacts: no
significant disturbing artifacts should be visible.
3
Check the spatial resolution.
The test film also shows three squares which each contains an oval. These 3 ovals
contain 3 groups, each having 5 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’
page
).
5
Record these values on Chart 3 (‘Drystar 5500/5503 Artifacts and Spatial
Resolution Control Chart’). Refer to
‘Charts for general radiography QC’
page
.
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.
In case of significant artifacts, insufficient spatial resolution or failure of
any other recommended QC tests, the cause of the problem must be
identified, and corrective action must be taken before the Drystar 5500
can be used for any further clinical imaging.
Refer to
‘Maintaining image quality and resolving Image quality problems’
page
‘Preventive maintenance schedule’
, or call your
local Agfa service organization for assistance.
Содержание Drystar 5500
Страница 1: ...Drystar 5500 5503 Reference manual 2900H EN 20071108 ...
Страница 6: ...6 2900H EN 20071108 DRYSTAR 5500 5503 REFERENCE MANUAL ...
Страница 176: ...176 2900H EN 20071108 Controlling the Drystar 5500 via a remote PC with browser DRYSTAR 5500 5503 REFERENCE MANUAL ...
Страница 226: ...226 2900H EN 20071108 Troubleshooting DRYSTAR 5500 5503 REFERENCE MANUAL ...
Страница 227: ...Equipment information sheet Appendix A ...
Страница 237: ...Drystar media density response data Appendix B ...
Страница 241: ...Quality Control Charts Appendix C ...
Страница 252: ...252 2900H EN 20071108 Quality Control Charts DRYSTAR 5500 5503 REFERENCE MANUAL ...
Страница 253: ...Remarks for HF emission and immunity Appendix D ...
Страница 259: ...Index Chapter E ...
Страница 265: ...265 2900H EN 20071108 Index DRYSTAR 5500 5503 REFERENCE MANUAL ...
Страница 266: ...0413 Printed in Belgium Published by Agfa HealthCare N V B 2640 Mortsel Belgium 2900H EN 20071108 ...