Siemens MAMMOMAT Novation DR, Руководство пользователя, Страница: 109 / 116

Siemens AG SPB7-250.815.06.02.02 MAMMOMAT Novation DR
12.05 CS SD 24
Appendix 109
Page 109 of 116
Medical Solutions
Line Artifacts
Problem Cause Recommended Action
Line Parallel to the
Short Axis Seam:
•
Seam correction algorithm not
turned on; wrong algorithm se-
lected.
•
Detector gain not calibrated
properly.
•
Seam (lines 1535 and 1536)
needs to be mapped out.
Source lines:
•
detector not calibrated properly.
•
line needs to be mapped out.
•
Perform detector calibration pro-
cedure (refer to "Gain calibration"
on
(Gain calibration / p. 72) .
•
Perform detector calibration pro-
cedure (refer to "Gain calibration"
on
(Gain calibration / p. 72) ).
•
Perform the bad pixel correction. (
Refer to "Creation of new pixel
map" on
(Creation of a new pixel
map (if necessary) / p. 76) ).
Line Parallel to the
Long Axis Line ends at seam or line partially
defective (gate lines).Line ends at
seam or line partially defective (gate
lines).
•
Detector not calibrated properly.
•
line needs to be mapped out.
•
Perform detector calibration pro-
cedure (refer to "Gain calibration"
on
(Gain calibration / p. 72) ).
•
Perform the bad pixel correction. (
Refer to "Creation of new pixel
map" on
(Creation of a new pixel
map (if necessary) / p. 76) ).
Line Runs Through
Seam
•
Read out problem; HV setting
time too short.
•
Hard copy device or processor
artifact.
•
Follow applicable problem solving.