GE Healthcare eXplore Locus SP, Service Manual

Page: 192 / 266

GE H
EALTHCARE
D
IRECTION
5158821-100, R
EVISION
3
E
X
PLORE
L
OCUS
SP S
ERVICE
G
UIDE
Page 192
7.4.7 Calculate & Edit Magnification Difference
This calculation is done to accurately display measurements on the screen in millimeters.
1. Install the Measured Plastic dowel into the small specimen tube, secure the dowel with foam,
and note the size of the dowel (e.g. 11.684) in the Worksheet.
2. Mount the small specimen tube.
3. Ensure the filter wheel is set to 4.
Note: Details concerning the following steps are found in the eXplore Locus SP User Guide . Refer to it
for particulars.
4. Turn off the X-Ray and Motor Controller application if it is still on.
5. Warm up the X-Ray Source.
6. Once warm, launch eXplore Scan Manager by double-clicking on the desktop icon.
7. Click Scan New Subject and name the subject pixel_size .
8. Enter mag_diff in the Scan Description field.
9. The Scan Control window opens. Choose 2x2wire from the Protocol drop-down menu.
10. Select the Scan bright and dark
first , Recon after scan and
Home all stages checkboxes
under Options.
11. Click on the Fluoro button.
When prompted, place
specimen in the scanner and
press
OK .
12. Click Menu in Fluoro and
choose Position Stages from
the drop-down menu.
13. Adjust the elevation until the
plastic dowel is in the mid
section of the
Fluoro screen,
then Exit Fluoro .
If the width of the small
specimen tube does not fit in the
field of view, calibration will
need to be repeated.
Verify all values before
restarting calibration.
14. Press the Start Scan button (the scan takes approximately 30 minutes). When prompted,
remove specimen from scanner. Bright and dark scans are scanned. When prompted, place
specimen back in scanner.
eXplore Reconstruction Utility is automatically launched once the scan is complete.
15. Click the Set to Central Slice button.
16. Click the Full Res button.