FujiFilm DR-ID 1300, Руководство по обслуживанию, Страница: 467 / 628

IN1-86
IN1-86
DR-ID 1300 / DR-ID 1300PU Service Manual
018-234-05E
13. Checking for Image Problems
13.1 Checking for Irregularities, Density
Problems, White Blank Portion, and
Sensitivity Problems in the Images
In the QC menu, select the panel units of TOP, CENTER and BOTTOM, and
check that there is no problem with the images.
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INSTRUCTION
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Check for the irregularities and the density problems respectively with the grid
removed and with the grid mounted.
If the grid is not to be used, you only need to check with the grid removed.
(1) From the CL, register the following exposure menu:
- “QC-Test” - “IMAGE-FORMAT” (size: 17 inches x 17 inches)
(2) Expose an IP.
- When the automatic X-ray detection function is used, expose an IP to a tube
voltage of 55 kV and a dose of 1.5 mR.
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INSTRUCTION
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When exposing an IP, position the tube directly above the center of the panel unit
for each panel unit that is to be acquired, then take exposures.
REFERENCE
Exposure condition examples for exposing an IP to a tube voltage of 55 kV and a
dose of 1.5 mR are shown below.
Distance: 180 cm
Voltage: 55 kV
Amperage and time: 1.6 mAs
(When the amperage and the time can be specified, minimize the amperage.)
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NOTE
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- If the exposure is performed with the exposure menu other than the specified
ones or with the exposure condition other than the referred one, abnormal
images, such as horizontal streak, may be found despite no error in the SE
since the study conditions are tight.
When an abnormal image occurred, perform the exposure with the specified
exposure menu and exposure condition, and check the images.
- When exposure is performed for the CENTER panel unit with the QC menu
(exposure menu when the third digit of the MPM code is 9), the upper and
lower ends of the image is blackened. Also, in other exposures, the left
and right ends of the image are blackened. At the boundary of blackening
treatment, an artifact may occur due to image processing.
- When the automatic X-ray detection function is not used, expose an IP to a
dose of 1 mR.
REFERENCE
Exposure condition examples for exposing an IP to a dose of 1 mR are shown
below.
Distance: 180 cm
Voltage: 80 kV
Amperage: 50 mA
Time: 13 msec
(3) Output the film in the one-image format to the printer.
(4) Check the output film for irregularities, partial density problems, and
white blank portions.
If moiré is determined to occur on the image, identify the cause and deal with the
problem according to the procedures mentioned in the Troubleshooting manual. The
image problems might be possibly caused by the movable grid.
{MT:4.1_Analyzing Moiré}