Siemens SOMATOM Emotion syngo CT 2007E Operator's Manual page 480

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Constancy Test
Performing the pixel noise
test
F.3-20
syngo CT 2007E
02/2008
The pixel noise is determined from two tomograms of the water
phantom in the same way as for the daily quality measurement.
F . 3
(→ Page F.2-1 Daily Quality Measurements)
Press the Start key on the control box.
Scanning is started.
F . 3
After the previous test has been completed, the Noise test is
i
F
. 3
started automatically.
Two images of the water phantom are recorded with identical
parameters. The difference between the first and the second
measurement is shown.
The following evaluations are displayed:
ROI
Mean value of the CT value
Sigma value (pixel noise)
Quality Assurance
Emotion Operator Manual
F . 3
F . 3
F . 3
F . 3
F . 3
F . 3
0 . 0
0 . 0

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