GE Discovery LS System Service Manual page 352

GE H
EALTHCARE
D 2307224-100, R
IRECTION EVISION
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After acquisition, recon as sinogram:
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To view, select/type:
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At the end of the weekly blank scan, if good
sinograms are obtained and transmission
acquisitions are needed, it is recommended to
use the following process for correction:
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Page 352
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4. PET Blank Scan
Full QA
Blank Scan
Acquisition (5 min. daily – 30 min. weekly)
Accept Setup
Move to Scan
Start Scan
Screens
Recon
Next Recon
Select Blank Scan data by date and time.
OK
Output = Sinogram
Submit to Top
Screens
Display
Mid
128 x 128
Rows = 5
Columns = 7
OK
Load
Select Blank Scan data by date and time.
Select the file needed and click OK.
Full QA
Blank Scan
Processing
Next Recon
Select Blank Scan data by date and time
and click OK.
Output = Correction
Submit to Top
5. Tube Warm- Up
Exam Rx
Daily Prep
Tube Warm-Up
Accept and Run Tube Warm-Up
Quit
Appendix B - System Calibration Quick Guide
D
ISCOVERY
30 Minutes
If acquisition fails, a message displays
explaining the failure and giving instructions.
To view the error log:
1. Utilities
2. Error Log Viewer
3. Message Level = Programmer
4. Update Message
Wait until Recon starts. The selected data will
display highlighted on the right during Recon,
and the number of slices processed displays.
View the sinogram and decide whether to use
data from this acquisition. A good acquisition
usually produces a homogenous sinogram.
Significant black stripes usually indicate an
error in the acquisition or in one or more
detectors. If these appear, call Service.
1 Minute
Do Tube Warm-Up if no CT scans were done
in the last two hours. During activation, a
message box displays in the upper right of the
screen. In addition, information about the
process displays in the center of the screen.
LS S S M
YSTEM ERVICE ANUAL