QA BEAMCHECKER™ PLUS 35
13. Once completed, the acquired measurements can be transferred to the PC for analysis. For
instructions, see the Data View and Downloading Measurements section of this manual.
7.3 High-Dose Rate Measurements
The QABC+ is equipped (beginning with SN Z142651 and higher) to handle high dose rates up
to 2400 MU/min and FFF beams.
NOTE: Existing QABC+ units can be upgraded to properly respond to high-dose rate beams
with a simple hardware upgrade. Please contact your Standard Imaging representative for
information on the upgrade.
The QABC+ should be set up in the same manner as used for standard daily linac QA
measurements. In order to differentiate the beam qualities (e.g. 6 MV versus 6 MV FFF), it is
suggested that two separate baselines are created during the initial setup of the device if a
single room is set up in the software.
For example, a baseline using 100 MU can be created for the 6 MV FFF beam, and another can
be created using 120 MU for the 6 MV beam in the same room. Alternatively, a separate room
could be created within the software to manage the FFF beams independently.
7.4 Wire-Free Measurement Fault
If a measured energy falls out of range of the preset baseline, the QA BeamChecker Plus
status indicator will show red and will respond differently based on action level:
The front panel will also display a fault code. If more than one beam parameter is out of
tolerance, multiple codes will display in sequence along with the detected energy.
In order to proceed to the next measurement, the fault must be acknowledged by entering
the treatment room and pressing the RESET / ROOM RESET button on the front panel. These
faults are recorded in the internal memory of the QA BeamChecker Plus for review after
downloading (See page 24). If the unit is turned off before the RESET / ROOM SELECT button
is pressed, this measurement point will not be saved.
The following is a list of possible fault codes by room type:
Static 5 Channel Room
ASM Axial Symmetry Out of Tolerance
TSM Transverse Symmetry Out of Tolerance
FLT Flatness Out of Tolerance
CST Constancy Out of Tolerance
XXX Energy could not be determined (See page 44)
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