GE Healthcare eXplore Locus SP, Service Manual

Page: 107 / 266

GE H
EALTHCARE
D
IRECTION
5158821-100, R
EVISION
3
E
X
PLORE
L
OCUS
SP S
ERVICE
G
UIDE
Page 107
4. Close MicroView upon
completion.
5. Use Windows Explorer to
rename the corrected image to
corrected_grid.vff
6. Run the transgen program. The
transgen program is located in
C:\Program Files\GE Medical
Systems\eXplore
Utilities\Calibration\.
7. Load the corrected_grid file into
the transgen program.
8. Adjust the Window (e.g. 2300)
and Level (e.g. remove graininess) until there are
minimal pixels visible except for the grid’s bebes.
Make the bebes as big and round as possible,
zooming in on individual bebes to check their
roundness and the surrounding area for visible
stray pixels.
Not getting the Window and Level right may affect
the centroid calculations.
To Pan, move the mouse while pressing Shift plus
the left mouse button simultaneously. To Zoom,
move the mouse up (to magnify) or down (to zoom
out) while pressing the right mouse button.
Note: If stray pixels touch or are close to any bebe, take a new image.
9. Place the cursor over the centre of the first bebe on
the top left of the grid and press
1 .
10. Place the cursor over the centre of the last bebe on the top right of the grid and press 2 .
11. Determine how many pixels there are between 1 and 2 (marker 2’s x position minus marker
1’s x position) and record in the Worksheet.
1 . . . . . . . . . 2
. . . . . . . . . . .
. . . . . . . . . . .
. . . . . . . . . . .
. . . . . . . . . . .