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5. Measurements with the Piranha System
CT
Piranha & QABrowser Reference Manual
2014-06/5.5C
136
6. First make a check of the position of the
Piranha by using the
Position Check
function.
Tap the kV range and select
Check[0]
.
7. Set up the CT to make a topogram.
8. Start the topogram program. If the procedure
includes more than one topogram you may
abort after the one taken with the tube in the top
position.
If the Piranha is positioned in a correct way, the position is accepted and the real-time
display is shown again. If not check the position of the Piranha and/or increase the slice
width if possible.
9. You are now ready to measure. Repeat the
topogram program to measure kVp.
The exposure time you measure is not related
to the actual "radiation time". It is the time it
takes for the detector to "pass through" the CT
X-ray field when the table moves when it is
acquiring the topogram.
5.7.2
Parameters for CT Scanner Models
The Piranha kV CT calibrations are specified as follows:
C1 = W/3.0 mm Al
C2 = W/3.0 mm Al + 0.25 Cu (optional)
C3 = W/3 mm Al + 1.2 mm Ti (optional) (for Siemens Somatom Definition 32 and
similar)
Summary of Contents for Piranha
Page 1: ...Reference Manual English Version 5 5C Piranha QABrowser RTI article number 9629050 10 ...
Page 8: ...Introduction Chapter 1 ...
Page 12: ...Description of the Piranha Chapter 2 ...
Page 40: ...Description of the QABrowser Chapter 3 ...
Page 77: ...Measurement Principles Theory Chapter 4 ...
Page 91: ...Measurements with the Piranha System Chapter 5 ...
Page 151: ...Optional Accessories Chapter 6 ...
Page 155: ...Problems and Solutions Chapter 7 ...
Page 161: ...Glossary Chapter 8 ...
Page 181: ...Notes Piranha QABrowser Reference Manual 2014 06 5 5C Notes 177 ...