WARNING:
Good viewing conditions are important for the correct
interpretation of both diagnostic and test images. Make sure
that the light box intensity (luminance) is 3000 and 6000 cd/m²
(4500 and 6500 °K) for mammography. Use a magnifying glass
and use shutters to collimate. Make sure the ambient light is
low.
1.
First, print out the QC mammography test image.
2.
Check the QC test image visually for artifacts: no significant disturbing
artifacts should be visible.
3.
Check the spatial resolution in each of the three circles (refer to item 1, 2
and 3 on the
‘QC test image’
). Within each circle there are three groups,
each consisting of five dots. All five dots of each group must be visible with
a magnifying glass. The smallest cluster of 5 dots is only visible if the
viewing conditions are good.
4.
Check the Low Contrast Visibility at both the high (100 / 95%) and low
end (0 / 5%) of the density scale. You should be able to see the circle in
the square (refer to item 1 on the
‘QC test image’
) and the upper circle
(refer to item 2 on the
‘QC test image’
).
5.
Record these values on Chart 3 (‘Artifacts and Spatial Resolution Control
Chart’).
WARNING:
In case of significant artifacts, insufficient spatial resolution
or failure of any other recommended QC tests, the cause of
the problem must be identified, and corrective action must
be taken before the printer can be used for any further
clinical imaging.
Related Links
Performing the daily QC test for mammography application
QC test image for mammography application
on page 109
on page 144
Preventive maintenance schedule
on page 120
Performing the annual QC tests for mammography application
Geometric Consistency Test
To be able to notice fluctuations in image size and aspect ratio, you must
perform this procedure once a year.
1.
First, perform the daily test.
2.
Use the QC mammography test image of the weekly test and measure the
dimensions A and B of the geometric square.
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| Crystal-M Imager | Advanced Operation (key-operator mode)
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