Table 4 CT acquisition protocol for CTAC and CAC.
System | GE discovery MI digital ready with 128 CT slices | |
|---|---|---|
Acquisitions | CTAC | CAC |
Mode | Low-Dose, Non-Gated | Prospective-ECG Gated |
Scan type | Spiral | Axial (Cine Mode) |
Tube voltage | 120 kVp | 120 kVp |
Tube current | 30–100 mA | 215 mA |
Rotation time | 0.8 s | 0.35 s |
Rotation length | Full | Segment |
Detector coverage | 40 mm | 20 mm |
Image thickness in recon 1 (Primary Recon) | Helical thickness—5.0 mm | Axial thickness—2.5 mm |
Pitch—0.984 | Image per rotation—8 images | |
Speed—38.37 mm/rot | Cine between images—0.05 s | |
Reconstructed image | CT Cardiac and CTAC | CT calcium score, CT Cardiac and CTAC |
Reconstructed DFOV | Recon 1—50 cm | Recon 1—25 cm |
Recon 2—50 cm | ||
Recon 2—41.9 cm | Recon 3—41.9 cm | |
Reconstructed image slice thickness | Recon 1—CTAC – 5.00 mm | Recon 1—CAC – 2.5 mm |
Recon 2—CTAC – 5.00 mm | ||
Recon 2—CT Cardiac – 1.25 mm | Recon 3—CT Cardiac – 1.25 mm | |
Matrix size | 512 × 512 mm | |
Anatomy region | Carina to apex of the heart | |
