Establishing the image geometry reference values for
mammography application
To establish the image geometry reference values, proceed as follows:
1.
Print the QC mammography test image or use the previously printed test
image.
2.
To determine the reference values for geometry, measure the distances A
and B of the geometric square on the test image.
WARNING:
Make sure to measure distance A from the left edge of the
left line to the right edge of the right line and distance B
from the upper edge of the upper line to the lower edge of
the lower line.
We strongly recommend using a 30 cm (12-inch) machinist
scale with 0.5 mm divisions (1/64 inch).
3.
Record these values as reference dimensions A
ref
and B
ref
on Chart 4
(‘Geometric Consistency Control Chart’).
These charts will be used for the annual quality test.
4.
Save this film for future reference.
Related Links
QC test image for mammography application
on page 109
on page 144
Performing the annual QC tests for mammography application
on page 118
114
| Crystal-M Imager | Advanced Operation (key-operator mode)
3852B EN 20210601 1655
Summary of Contents for 5367/300
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