5. Measurements with the Barracuda System
CT
Barracuda & QABrowser Reference Manual
2012-10/4.3A
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5. Next the detector selection screen is
shown. Tap the electrometer module and
select the CT chamber you want to use, in
this example "DCT10".
6. Tap Select and confirm that bias can be
turned on. It takes approximately 20
seconds for the bias to stabilize.
The setup may look like the picture below. In this case the measurement is performed
on a CT that is used exclusively for investigations of the head region. The available
clinical programs are only covering the head and the phantom has therefore been
placed on the head of the patient bed.
7. The Barracuda is now ready to measure
CT dose.
8. First make a topogram (scout/pilot image)
to determine where to make the CT scan
for the CT dose measurement.
The Barracuda might not trig on the
topogram since it often uses a lower mA
than when acquiring "normal" CT images.
9. Make sure to reset Barracuda after the topogram has been acquired. Tap Reset.
10. Setup the CT based on the topogram to make one scan in the middle of the CT
phantom.
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