QA BEAMCHECKER™ PLUS 78
Upon detection of a such an error, a repair operation is attempted. If upon rebooting the QA
BeamChecker Plus, the CRC error is no longer displayed, the repair was likely successful.
However, anytime this error is displayed, it is recommended to contact Standard Imaging for
diagnostic review.
On some energies, QA BeamChecker Plus measurements show inconsistent variation day to day even though
other measurement with other devices indicated linac should not be exhibiting this behavior.
Tip 1:
When taking measurements with the QA BeamChecker Plus, the instrument should be
placed in the same position on the couch as when the baseline measurement was taken.
Variations in placement can affect how scatter from elements in the couch contributes to the
chamber signal readings, especially for low energy photons.
Tip 2
Performing measurements at roughly the same time each day (within a couple of hours) will
increase the consistency of the reading. Additionally, the daily measurement should
correspond to the time of day that the baseline was taken. Working from a baseline taken in
the morning and performing daily measurements in the evening can contribute variation, as
much as 2% depending on the consistency of temperature, pressure, but more significantly
how “warmed up” the treatment machine is. An initial linac warm-up of 500-1000 monitor
units is recommended before any QA measurements are taken.
When using the software, certain screen elements such as buttons or text are cut off or hidden
Possible Cause 1:
The screen resolution is set too low. Ensure the system screen resolution is set to at least 1024 x
768 pixels and the QA BeamChecker Plus software window is maximized.
Possible Cause 2:
The system font and screen elements setting is set to non-default. Setting above 96 DPI
(Windows 2000 or XP) or 100% (Windows Vista or 7) can crop certain screen elements. This can
also be solved without changing the global Windows setting by using the “Disable display
scaling on high DPI settings” compatibility setting. This setting can be accessed by right-
clicking the program shortcut, selecting Properties and navigating to the Compatibility tab.
16.2 Frequently Asked Questions
Can I install the QA BeamChecker Plus software on multiple PCs?
Yes. There is no limit (technically or legally) to how many PCs can run the QA BeamChecker
Plus software application simultaneously. Since the database file can be stored to a network
accessible location, it is common to have the Communications Software installed at the
control console of each treatment room, as well as other computers that may be used to
examine measurement data saved in the database in greater detail.
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