147
4.3 Troubleshooting for Image Quality
REGIUS MODEL 190 Service Manual Ver.1.00 2004.11.01
4.3.18 Case 17: Dose irregularities (i.e., bad correspondence of mAs and S values, etc.)
4.3.19 Case 18: Image disparity
4.3.20 Case 19: White blotches
4.3.21 Case 20: Black blotches
4.3.22 Case 21: Monitor display problems (OK with film)
Phenomena
Cause/Remedy
1
Incorrect sensitivity calibration.
Repeat the sensitivity calibration.
2
The log-log curve created by measuring the val-
ues for "mAs" and "mR" is not linear. (check the
linearity for each of 1mAs, 10mAs, 100mAs
against mR)
Request the X-ray tube manufacturer for remedies.
Remedy
1
Check the bulb dose (i.e., measure the mR value and con
fi
rm whether the dose is correct)
2
Con
fi
rm the exposure settings. (Refer to the recommended value in the medical ledger)
Remedy
1
Clean any dust from the plate and then check the solid image.
2
If the blotches remain, there is a possibility of plate defects and the plate should be replaced.
Remedy
1
Erase the plate and re-expose.
Remedy
1
Brightness between the viewer and the monitor does not match. Regenerate the display's LUT.
Summary of Contents for REGIUS 190
Page 7: ...VI REGIUS MODEL 190 Service Manual Ver 1 00 2004 11 01...
Page 13: ...Blank...
Page 27: ...xx REGIUS MODEL 190 Service Manual Ver 1 00 2004 11 01...
Page 28: ...Chap 1 Overview...
Page 29: ...Blank Page...
Page 43: ...16 1 3 Layout of Controlling Components REGIUS MODEL 190 Service Manual Ver 1 00 2004 11 01...
Page 45: ...Blank Page...
Page 52: ...Chap 2 Disassembly and Reassembly...
Page 53: ...Blank Page...
Page 118: ...Chap 3 Maintenance Adjustment...
Page 119: ......
Page 154: ...Chap 4 Troubleshooting...
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Page 194: ...A Appendix...
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Page 220: ...0676 55030 B 0412TE...