Verifying Acceptable Spatial Resolution, Artifact Levels and
Low Contrast Visibility for mammography application
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 between 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.
To verify acceptable spatial resolution, artifact levels and low contrast
visibility, proceed as follows:
1.
Print the QC mammography test image or use the previously printed QC
mammography test image used to establish the daily operating density
levels.
2.
Visually check the QC test image for artifacts: no significant disturbing
artifacts should be visible.
3.
Check the spatial resolution in each of the three circles. 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 and the upper circle.
5.
Record these values at the top of Chart 3 (‘Artifacts and Spatial Resolution
Control Chart’).
6.
These charts will be used for the weekly quality test.
WARNING:
In case of significant artifacts or insufficient spatial resolution,
the reason must be found and the problem solved before any
further clinical films can be printed.
Related Links
QC test image for mammography application
on page 109
on page 144
Performing the weekly QC tests for mammography application
on page 117
Preventive maintenance schedule
on page 120
Crystal-M Imager | Advanced Operation (key-operator mode) |
115
3852B EN 20210601 1655
Содержание 5367/300
Страница 1: ...Crystal M Imager 5367 300 User Manual 3852B EN 20210601 1655 ...
Страница 12: ...12 Crystal M Imager Crystal M Imager 3852B EN 20210601 1655 ...
Страница 57: ... The display Crystal M Imager Introduction 57 3852B EN 20210601 1655 ...
Страница 89: ...WARNING Never reuse a jammed film Crystal M Imager Basic Operation operator mode 89 3852B EN 20210601 1655 ...
Страница 128: ...5 Press the OK button on the touchscreen 128 Crystal M Imager Preventive maintenance schedule 3852B EN 20210601 1655 ...
Страница 134: ... Cables transducers and accessories 134 Crystal M Imager Remarks for HF emission and immunity 3852B EN 20210601 1655 ...
Страница 152: ...4 18 2832E EN 20151008 5 Remove plastic bag 152 Crystal M Imager Plug Play Installation Manual 3852B EN 20210601 1655 ...
Страница 161: ...Crystal M Imager Plug Play Installation Manual 161 3852B EN 20210601 1655 ...