GE Healthcare eXplore Locus SP, Service Manual

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GE H
EALTHCARE
D
IRECTION
5158821-100, R
EVISION
3
E
X
PLORE
L
OCUS
SP S
ERVICE
G
UIDE
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7.5.2 Perform Verification Scans (1x1, 2x2 & 4x4 Modes)
The following procedure is used to verify the calibration settings.
Note: The ambient temperature in the room must be stable to perform this procedure i.e. the room
temperature should not change even by 1 degree during the scanning process.
First perform verification scans for 1x1 mode using the procedure below, then repeat the procedure
in order to perform verification scans for 2x2 and 4x4 modes.
FIND THE IDEAL CENTRE OF ROTATION AT CENTRAL SLICE:
1. Place the wire phantom in the small specimen tube, secure the phantom with foam, and mount
the tube.
2. Ensure the filter wheel is set to 4 (or 1 for 4x4 mode)
Note: Details concerning the following steps are found in the eXplore Locus SP User Guide . Refer to it
for particulars.
3. Warm up the X-Ray Source.
4. Once warmed up, launch eXplore Scan Manager by double-clicking on the desktop icon.
5. Click Scan New Subject and name the subject 1x1 (or 2x2 or 4x4 depending on which
verification scans are being performed).
6. Enter 1x1wire in the Scan Description field (or 2x2wire or 4x4wire depending on which
verification scans are being performed).
7. The Scan Control window opens. Select 1x1wire from the Protocol drop-down list (or 2x2wire
or 4x4wire depending on which verification scans are being performed).
8. Select the Scan bright and dark first , Recon after scan and Home all stages checkboxes under
Options.
9. Start Fluoro .
10. Click Menu and choose Position Stages from the
drop-down list.
11. Adjust the elevation until the wires of the center
section of the wire phantom extend from the top to
the bottom of the screen.
12. Exit Fluoro .
13. Press the Start Scan button (the scan takes
approximately 45 minutes) and follow the prompts
to place and remove the specimen from the
scanner for the bright and dark scans.
The eXplore Reconstruction Utility launches
automatically when the scan is complete.
14. Click the Set to Central Slice button.
15. Click the Thumbnail button.
16. Change the Z-Size field to 5 .