AGFA CR 30-X Service Manual page 391

DD+DIS171.06E
4.4.2 Checking the Images at the Lightbox or Viewing Station
(1) Compare the flatfield made at the beginning of the maintenance procedure with
the one made under step 4.4.1.
Evaluation:
•
•
(2) Check the image quality of the flatfield for absence of any stripes and large area
inhomogeneities.
•
4.4.3 Comparing the Flatfield with the Test Patterns "Lowest Acceptable Quality"
IMPORTANT:
This step is only required, if the flatfield image made under step 4.4.1 shows stripes in
fast scan or slow scan direction or large area inhomogeneities.
(1) Insert the limit pattern CD-ROM (part of delivery) into the CD-ROM Drive.
(2) On the NX workstation select the Main Menu.
(3) Select "import images".
(4) Browse to the CD-ROM drive.
(5) Select the folder of the test patterns.
(6) Select OK.
(7) Wait till the images are imported (approx. 30 seconds).
(8) Select the Examination menu.
(9) Print the image or send it to the archive (depending on what is available).
(10) At the lightbox or the viewing station visually compare the scanned flatfield with
the limit pattern. The limit pattern represents the lowest acceptable image quality
in slow scan and fast scan direction: Compare the stripes in "slow scan" and in
"fast scan" direction".
See also IMPORTANT note on page 27 if a FLFS cassette is used for flatfield
evaluation.
The controlled version of this document resides on MedNet. Any printed copy of this document is uncontrolled.
Edition 1, Revision 1
01-2009
If the image made during step 4.4.1 visually looks as good or better than the
flatfield made at the beginning of the maintenance procedure, the image
quality is okay.
If there are unacceptable effects in slow scan or fast scan direction, refer to
the troubleshooting guide, DD+DIS151.08E.
If the flatfield image shows stripes in fast scan or slow scan direction or large
area inhomogeneities compare the image with the limit pattern.
See section 4.4.3.
DOCUMENT CONTROL NOTE:
Type 5175 / 100/110
CR 30-X
Maintenance
Chapter 9 / 25
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