64 Slice MDCT Protocols: Cardiac |
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Specific anatomic region |
Coronary |
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Application |
Coronary CTA - coronary artery disease |
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Author |
Elliot K Fishman, MD |
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Reference Source |
JHU Protocol |
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Scanner Used |
Siemens Sensation 64 |
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KV/Effective mAs/ Rotation time (sec) |
Calcium
scoring: 120 / 209 / 1.5 sec cycle time Test bolus 120 / 40 / 2.0 sec cycle time CTA 120 / 850 / 0.33 sec |
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Detector Collimation (mm) |
0.6 |
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Slice thickness (mm) |
0.75mm (thin) 3.0mm (thick) |
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Pitch |
Calc
score 18.0 feed Test bolus 0.0mm feed CTA 0.2mm |
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Kernel |
B25f
smooth ++ mediastinum (calcium score) B20f smooth mediastinum (test bolus) B10f very smooth cardiac (thin) B25f smooth ++ cardiac (thick) B20f smooth cardiac (multi) |
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Reconstruction interval |
0.5mm
(thin) 3.0mm (thick) 0.6mm (multi) |
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Image order (acquisition) |
Cr-ca |
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Oral contrast |
N/A |
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IV contrast volume and type |
100
cc of Visipaque 320 20 cc for test bolus 80 cc CTA |
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Injection rate |
4 cc/ sec |
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Scan delay (sec) |
10
sec test bolus CTA depends on outcome of test bolus usually 25-30 sec |
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3D technique used |
VRT, MIP, & MPR |
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Comment: Also have protocol using 0.37 rotation time for patient with heart rates under 50 bpm. |
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