Discovery QDR Series Technical Manual
4-37
4.14.3 Calibration of Area and BMC, for Array Scan Modes
After the machine has been calibrated for thickness measurement in the array mode, it
must be calibrated for the array AREA and BMC measurements.
1. Restart the Discovery software in service mode (if not already). Center the table.
From the Discovery Main Menu screen, select Utilities|Service Utilities|AP
Reposition. Return to the menu and select Utilities|Service Utilities|Auto
Scan.
2. Select the Spine Phantom.
3. Click OK at Patient Confirmation dialog box.
4. Select AP Lumbar Scan Type, input 20 for number of scans, uncheck Use
Default, and click the Next button.
5. Select Array and click the Next button.
6. Analyze the first scan manually. Note the scan #. Click the Close button to exit
analysis.
7. From the Discovery Main Menu screen, select Utilities|Service Utili-
ties|Auto Analyze.
8. Click on unanalyzed Scans and select the 19 scans, click on Compare radio but-
ton and then click the next button.
9. Now, select the scan analyzed in step 6 and click the next button.
10. The 19 scans will now be compared with the analyzed scan.
11. From the Discovery Main Menu screen, select Utilities|Service Utili-
ties|Field Service Calibration.
12. Click the ACF/BCF button. Select the 20 scans, click next, and then click Con-
tinue at the Successfully Calculated dialog box.
13. At the Field Service Calibration dialog box, click the Write button to write the
values to ARRC.TXT file. Click the Continue button to return to the Discovery
Main Menu screen.
14. Print ARRC.TXT file by using these steps:
•Press the <Ctrl><Esc> keys to bring up the WindowsXP Taskbar.
• Select Find
• Select Files or Folders
• Type ARCC.TXT in the Named: edit box.
• Click Find Now or simply hit the <Enter> key.
• Right click on the first ARRC.TXT entry in the list presented to you and select
Print from the menu. (You want the ARRC.TXT entry in the QDR\DATA
directory
NOT the QDR\DATA\LRTEMP directory.)
15. Verify ACF=ACFL=ACFT and BCF=BCFL=BCFT in ARRC.TXT.
To Next Page
Loading...
