Chapter 3 Troubleshooting
3-48
3.4.26 All Processed Images are Generally Low in Contrast
3.4.27 Image Out of Focus
No.
Cause
Response
1
Output density in the process parameter
is set low in contrast in general.
•
Reset the rotate/shift parameter output density H
higher.
•
Reset the rotate/shift parameter output density L
lower.
See the Image Process Adjustment Manual for details.
Important
Always perform the image size adjustment, the image position adjustment, the unevenness
calibration, and the sensitivity calibration after replacing the optical unit.
No.
Cause
Response
1
X-ray exposure time is too long.
Organs will move when the time is
longer.
•
Confirm the exposure time to the site. Also
confirm that the display S value is less than 50
and abnormally small.
•
Confirm there is no problem with the photo timer.
2
Fault in the beam diameter
•
Measure the chart method MTF.
•
Replace the optical unit if the value of 2 cycles/
mm is 22% or less.
See
"5.2.5 Removing/Installing the Optical Unit
for the procedure to replace the
optical unit.
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