139
4.3 Troubleshooting for Image Quality
REGIUS MODEL 190 Service Manual Ver.1.00 2004.11.01
4.3.3 Case 2: Entire image is too bright, whitish (with subject structure)
Cause Remedy
1 The output density of the G-processing parameters
is too low overall.
Set the H/L brightness setting from the G-processing
parameters to a higher value.
(For more details, refer to the Image Processing
Adjustment Manual)
2 The X-ray dose is extremely low or non-existent. • Check the exposure conditions, and confirm that
the Exposure switch is not released during X-ray
exposure.
• Confirm the X-ray dosage using a quantimeter.
3 S-value (i.e., gain) setting of the REGIUS Console
is too low (for FIX processing and non-processed
images)
Correct the S value setting to a suitable level.
4 Failure in sensitivity correction Review the sensitivity correction.
5 For some reason, the ROI identified for processing
is not correctly set.
Correct the ROI setting to the appropriate position.
6 There is a problem with the REGIUS 190's photo-
multiplier or high-voltage system.
1) ADB2's photomultiplier high-voltage switch is set
to OFF.
1) Set the switch to ON.
2) Replace the ADB2 if it is faulty. --> Replace the
ADB2.
2) Replace the ADB2. Refer to "2.7.4 Replacement
of ADB2 (A/D board), p.86".
3)Photomultiplier is damaged. 3) Replace the photomultiplier. "2.6.1 Replacement
of Photomultiplier (PMT), p.75"
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