Siemens SOMATOM Emotion syngo CT 2007E Operator's Manual page 477

Quality Assurance
Performing the homogenei-
ty test
syngo CT 2007E
02/2008
With this test, you measure the homogeneity of the CT values in
5 regions of the water phantom.
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Press the Start key on the control box.
Scanning is started.
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After the previous test has been completed, the Homogeneity
i
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test is started automatically.
An image of the water phantom is recorded. 5 ROIs are marked
in the image, one central and four peripheral.
In addition to the ROIs, the mean values and standard devia-
tions of the CT values are displayed.
The difference between the mean values of the central ROI and
the peripheral ROIs is displayed.
Constancy Test
Emotion Operator Manual
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