5. Measurements with the Barracuda System
CT
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Barracuda & QABrowser Reference Manual
11. You can now make one scan to verify
that everything works before you go on to
the CTDI application.
You can also read the scan time, in this
case 1.008 s.
12. Now tap Appl and select CTDI.
The CTDI application will help you to
measure and calculate the CTDI. It
calculates a weighted CTDI based on a
measurement in each of the five
positions.
13. Tap Slice thickness and specify the
actual value.
If you are measuring a multi-slice CT you must use the total slice width that is:
(number of slices) × (individual slice width)
14. Make a scan with the CT chamber in the
centre.
The value is recorded and a message box
is displayed. Do not click OK until the CT
chamber is moved to the next position.
15. Move the CT chamber to position B.
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