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 – helical scan<br />
• Breath hold issues with 4 slice scanner<br />
• Time to cover heart (number <strong>of</strong> beats) decreases with larger<br />
detector array<br />
4 x 1 mm slice<br />
16 x 1mm slices 64 x 0.5 mm slices<br />
4 mm<br />
16 mm 32 mm<br />
~48 sec ~12 sec ~6 sec<br />
Harefield <strong>Cardiac</strong> Course<br />
0.5 s rotation, 0.33 pitch
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