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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<strong>Cardiac</strong> <strong>CT</strong> – ECG phases<br />
• To ‘freeze’ cardiac motion:<br />
– Image during phase <strong>of</strong> least cardiac motion<br />
– Phase given as percentage <strong>of</strong> R-R interval<br />
– Ideal width at least 10% <strong>of</strong> R-R interval:<br />
Phase position<br />
width<br />
60 bpm (1 bps) 100 ms<br />
R<br />
R R R<br />
ECG<br />
t<br />
<strong>Cardiac</strong><br />
motion<br />
Harefield <strong>Cardiac</strong> Course<br />
Ideal imaging window ~ 10%
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