Section 4 - Alignment & Calibration
4-39
Modified ENVIRON.BAT
Press CTRL - ALT - DEL
11.
Press CTRL - ALT - DEL to re-boot the computer.
12.
After re-boot, print the ARRC.TXT file by typing COPY \XCDATA\ARRC.TXT
LPT1:
13.
Verify that ACF = ACFL = ACFT, and BCF = BCFL = BCFT.
14.
Print ENVIRON.BAT and verify that ACF and BCF are the same as in ARRC.TXT.
Adding Array AP Scans to the QC Database
Once the unit has been calibrated, AP scans must be re-analyzed and added to the QC database.
1.
Perform the following procedure on the AP Array scans acquired in Step 1 of the
Calibration of Area and BMC, for Array Scan Modes
section above.
2.
Exit to the DOS prompt, System disk, Menu directory.
3.
Type RECALYZE. At the message type any key.
4.
At the scan selection menu, select the scans to be re-analyzed (i.e. scans acquired in
Step 1 of the
Calibration of Area and BMC, for Array Scan Modes
section above) and
type <Enter>. The re-calibration analysis is complete when the system returns the
prompt.
5.
Once all the scans have been analyzed, add them to the QC database. Beginning from
the main QDR menu, press "Q" for
QC
, then press "A" for
Add
, and then select the 20
(medium) array AP scans to be added to the QC database.
6.
Select the PLOT option (also under the QC menu) to plot a AREA, BMC and BMD plot
for each array mode.
7.
Ensure that all scans fall between the two dotted white limit lines.
8.
Print the BMD, BMC and Area QC plots. Include them with the other paperwork being
returned to Hologic.
Note:
For more details on performing the QC setup and producing QC plots, refer to the QDR
4500 User's Guide.
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