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