QDR
4500 Technical Manual
4-36
27.
Press "S" <Enter> to select the "
s: His\Los for ARRAY SPINE phantom
"
option and to calculate the new thickness indicators for array spine mode (HIA_N,
LOA_N, HIT_N, and LOT_N).
28.
Press "+" to select the
AP spine scan
, performed at Step 6 above, using the array scan
mode. The program will then calculate new HIA_N, LOA_N, HIT_N, and LOT_N
values and present them on the screen.
WARNING:
Do not modify any values.
29.
Press <F10> (to display the second screen).
30.
Press <F10> again (to accept the values). The program will now verify that these values
are within specification, display those which are out of range, and return to the FSCAL
opening menu.
31.
Press "L" <Enter> to select the "
l: His\Los for ARRAY LATERAL
phantom
" option and to calculate the thickness indicators for fast lateral spine mode
(HIA_NL, LOA_NL, HIT_NL, and LOT_NL).
32.
Press "+" to select the
fast lateral spine scan
performed at Step 15 above. The program
will then calculate new HIA_NL, LOA_NL, HIT_NL, and LOT_NL values and present
them on the screen.
WARNING:
Do not modify any values.
33.
Press <F10> (to display the second screen).
34.
Press <F10> again (to accept the values). The program will now verify that these values
are within specification, display those which are out of range, and return to the FSCAL
opening menu.
35.
Press "E" <Enter> to select the "
e: write temporary results
" option, which
will write the calculated values into the ARRC.TXT file and then return to the FSCAL
opening menu.
36.
Press "X" <Enter> to EXIT the FSCAL program.
Scan Thickness Measurement & Calibration (QDR 4500W and C)
1.
From the QDR patient menu, select the spine phantom to be used for checking the array
scan modes. This should be the one shipped with the machine.
Note:
Be sure the spine phantom has been entered in the patient database in the form of "Spine
Phantom #
nnn
" (where
nnn
is the number of the phantom) so that the QC plot program
can identify it properly.
2.
Press Center Table.
3.
Turn on the laser.
4.
With the laser on, place the phantom so that the laser dot is on the centerline of the
phantom, 1/2" from the left end, shining on the phantom target. The sides of the
phantom should be aligned parallel to the table, using a ruler if necessary.
To Next Page
Loading...
