Hologic QDR 4500 - Step 4: Re-label the QDR PHANTOM

QDR
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4500 Technical Manual
B-6
b. Enter the ORIGINAL PHANTOM height printed in Step 1.3f into the NEW QDR
system and Press <F10>.
Enter the measured height for phantom # xxxx : 6.78
c. Verify that the Array phantom information is correct and press “Y” to continue.
d. Chose option “a” from FSCAL. Select the 20 A/P Array Spine scans of the
ORIGINAL PHANTOM from Step 3.2 by using the <+> key. Press <Enter> after all
20 sans have been selected. The results of each scan will flash on the screen as it is
read into the program.
e. A green screen will appear when all of the scans have been processed. The Area,
BMC, and BMD results and CV’s will be displayed. In addition, the screen will
display a separate message for Area and BMC saying whether or not the system is out
of calibration. Press <Print scrn> to obtain a copy of this screen. If either the Area or
BMC is out of calibration, the following message will appear: "It is recommended
that the recalculated ACF/BCF be used." Answer "Y" to the query "do you want to
recalibrate?".
f. Press <F10> twice.
g. Choose option "w" from the FSCAL menu to write the new values to ARRC.TXT.
Press <Enter> to clear the message “THE ARRC.TXT FILE HAS BEEN UPDATED”
and press <ENTER> to clear the message “THE ENVIRON.BAT FILE HAS BEEN
UPDATED”.
h. Reset the NEW QDR by pressing <Ctrl><Alt><Del>.
i. Recalyze the 20 scans of the ORIGINAL PHANTOM from Step 3.2 by exiting to
DOS and typing “RECALYZE” <Enter>. Select the 20 A/P Array Spine scans of the
ORIGINAL PHANTOM using the <+> key and press <Enter>. The scans will be
automatically reanalyzed.
j. Add the 20 scans from 3.6i to the NEW QDR QC database. Setup the QC database to
reflect the ORIGINAL PHANTOM number and the results of the 20 recalyzed scans
of the ORIGINAL PHANTOM.
Note:
Step 3.7j is unnecessary if the customer intends to use the QDR phantom to perform daily
QC on the NEW QDR. If the customer intends to use the QDR phantom on the QDR,
proceed to Step 4 and disregard the instructions in Step 3.6j and 3.6k.
Note:
Step 4 may also be necessary if the ORIGINAL PHANTOM is an older design with large
separations between vertebral bodies. These separations can cause poor precision on the
QDR. If the BMD CV of the QDR is greater than 0.5% when the ORIGINAL PHANTOM
is used, proceed with Step 4 to relabel the QDR phantom for daily QC on the QDR.
k. (Skip this step if the customer intends to use the QDR phantom for daily QC on the
NEW QDR). Enter QC from the main menu. Verify that the QC program asks for the
ORIGINAL PHANTOM serial number. Perform a daily QC scan according to the
instructions on the monitor. After the scan has been analyzed press <Enter> to add the
scan to the QC database. Inspect the database to ensure that the scan is within the QC
limits.