Daily Calibrations - GE Discovery LS System Service Manual

GE H
EALTHCARE
D 2307224-100, R
IRECTION EVISION
B.1

Daily Calibrations

The procedures in the following "quick guides" can be used as guidelines by experienced users.
They are intended for reference after the user has gained an understanding of the procedures from
reading the full descriptions in the Discovery LS Operator Guide.
System
CT
PET
1.
2.
3.
4.
5.
6.
After acquisition, recon as sinogram:
1.
2.
3.
4.
5.
6.
7.
To view, select/type:
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
Page 348
6
1. Reboot Subsystems
1. Service
2. System Resets
3. Scan
4. Run
1. PET
2. Service
3. Terminal Interface Pkg
4. Tip All
5. Four screens open. In three of them
(excluding Table), type Reboot [Enter].
2. 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.
Appendix B - System Calibration Quick Guide
D
ISCOVERY
5 minutes
A message displays "Scan completed
successfully". If this does not happen
after two tries, call Service.
On each screen a message ending
"...completed normally" displays.
Close each screen after message
displays.
If this does not happen after two tries,
call Service.
5 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.
LS S S M
YSTEM ERVICE ANUAL