Table 1.
Imaging protocol
| SSCTb | DSCTc | |
|---|---|---|
| β-blockera | Yes | No |
| Nitroglycerina | No | Yes |
| X-ray tube | 1 | 2 |
| Collimation | 32 × 0.6 (Z-FFS) | 32 × 0.6 (Z-FFS) |
| Gantry rotation time (ms) | 330 | 330 |
| Temporal resolution [ms] | 165 | 83 |
| Spatial resolution (mm) | 0.4 × 0.4 × 0.4 | 0.4 × 0.4 × 0.4 |
| Pitch | 0.2 | 0.2–0.53 |
| Rotation time (ms) | 330 | 330 |
| Unenhanced imaging | ||
| Tube voltage (kV) | 120 | 120 |
| Tube current | 200–150 effective mAs | 75 mAs/rotation |
| ECG-triggered tube current modulation | Yes | Yes |
| Contrast-enhanced imaging | ||
| Tube voltage (kV) | 120 | 120 |
| Tube current | 850–960 effective mAs | 320–412 mAs/rotation |
| ECG-triggered tube current modulation | No | Yes |
SSCT single-source CT, DSCT dual-source CT, Z-FFS Z-flying focal spot, ECG electrocardiogram, mAs/rotation total mA × rotation time
aAdministration before imaging when no contraindication was present
bSomatom Sensation, Siemens Healthcare, Forchheim, Germany
cSomatom Definition, Siemens Healthcare, Forchheim, Germany