Technical Aspects of Cardiac CT - ImPACT CT Scanner Evaluation ...
Technical Aspects of Cardiac CT - ImPACT CT Scanner Evaluation ...
Technical Aspects of Cardiac CT - ImPACT CT Scanner Evaluation ...
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Volume coverage – single beat high pitch<br />
• Siemens Definition Flash<br />
– high pitch helical (pitch 3.4), each image 75 ms<br />
– phase difference between first and last ~ 300 ms<br />
– only suitable for regular heart rates < 65 bpm<br />
~300 ms<br />
Flash mode (Pitch 3.4)<br />
< 1 sec<br />
Radiation on<br />
Acquired slices<br />
(each at 75 ms)<br />
R<br />
R<br />
Tube 1 Tube 2<br />
Harefield <strong>Cardiac</strong> Course