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Quick screen QA test function
The quick screen QA test allows the monitor to display an internal test pattern similar to AAPM TG18-QC, without using an
external signal source. A quick overall visual evaluation as well as an inspection of the gray levels according to DICOM is
available with this built-in method.
- If the monitor is connected with a video signal source (computer):
Make sure that no OSD menu is displayed, then press the RESET button for more than 3 seconds or press the RESET button
twice. This will start drawing the test pattern across the screen, then start the DICOM MEASURE routine, if GAMMA in the
PICTURE MODE is set to DICOM. Please note that the monitor must be warmed up for at least 30 minutes for this test to
deliver valid results. The test pattern will hide the image of the signal source.
After fi nishing the measurements done with the integrated front sensor, the result will be displayed.
The MAX. GSDF ERROR result (in %) is a quick indicator of the gray level quality against the ideal DICOM curve. Depending on
the QA standard which is used in your country, different GSDF error limits may exist. Please compare the actual result with your
local regulations or guidelines.
You may now check the gray levels and the overall quality visually.
To exit the QA TEST mode, press "EXIT". The image of the video signal source will return.
- If the monitor is not connected with any video signal source:
Make sure that only the NO SIGNAL message is displayed, then press the RESET button for more than 3 seconds. This will
start drawing the test pattern across the screen, then start the DICOM MEASURE routine, if GAMMA in the PICTURE MODE is
set to DICOM. Please note that the monitor must be warmed up for at least 30 minutes for this test to deliver valid results.
After fi nishing the measurements done with the integrated front sensor, the result will be displayed.
The MAX. GSDF ERROR result (in %) is a quick indicator of the gray level quality against the ideal DICOM curve. Depending on
the QA standard which is used in your country, different GSDF error limits may exist. Please compare the actual result with your
local regulations or guidelines.
You may now check the gray levels visually to compare with the measurement result.
To exit the QA TEST mode, press "EXIT".
16 level luminance patches should
be discernible from each other.
Luminance ramp elements should
be visible without any bending.
5% and 95% luminance patches
should be discernible from the
surrounding 0% luminance
respectively 100% luminance
patches.
Low-contrast patterns create
with 8 bit digital driving patterns.
English-17
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