Hologic DISCOVERY A - RECALYZE and Add Array AP Scans to the QC Database

Discovery QDR Series Technical Manual
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4.14.4 RECALYZE and Add 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.
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. From the Discovery Main Menu screen, select Utilities|Service Utili-
ties|Auto Analyze.
2. Select Analyzed scans, click RECALYZE, and select the 20 scans just acquired
and click the Next button.
3. . The scans will now be recalculated to the new calibration.
4. Highlight the scans from the Excluded list and click the Include Scans button
and then the Finish button. (Selection is easier if you click Scan Date bar above
the list. This will order the scans by date and time).From the Discovery Main
Menu screen, select QC|QC Data Management|Select Scans.
5. From the Discovery Main Menu, select the QC|QC Data Management|Plot
to create plots for BMD, BMC, AREA, HiAir, and LoAir plot for each array
mode. Verify that the QC plots inlcude QC scans from at least the last two years.
6. Ensure that all scans fall between the two, dotted limit lines.
7. Print the BMD, BMC, Area, HiAir, and LoAir 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
Discovery User's Guide.
Sample HARDWARE.INI (Calibration) File
HARDWARE.INI Variables Set by… Descriptions
[Version] .INI File Section Name
HardwareModel=14 Factory Discovery model (C=20, W=21, A=23, SL=22).
[Laser]
LaserYOffset=-38100 Factory Laser Offset Value
[TxMotor]
PosLimitPosition=409575 Factory Positive limit in microns (= 16 1/8 inches)
SpineInitPos=208000 Factory TX center position in microns (= 8.18 inches)
MaxSpinePos=233400 Factory + Limit for spine placement
MinSpinePos=182600 Factory - Limit for spine placement
PatientUnloadPos=0 Factory Table position for unloading patients
APLatDiff=376200 Factory AP/Lateral Difference
MaxTrackOffset=25400 Factory