Quality Assurance Constancy Test
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syngo CT 2007E Emotion Operator Manual
02/2008
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F.3-17
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Performing the homogenei-
ty test
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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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i
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F
After the previous test has been completed, the Homogeneity
test is started automatically.
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An image of the water phantom is recorded. 5 ROIs are marked
in the image, one central and four peripheral.
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In addition to the ROIs, the mean values and standard devia-
tions of the CT values are displayed.
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The difference between the mean values of the central ROI and
the peripheral ROIs is displayed.
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