Table 1.
Stroke scan protocol. Scout images and test bolus details are not reported
| Non-contrast CT | CT perfusion | CT angiography | |
|---|---|---|---|
| Tube voltage (kVp) | 120 | 80 | 120 |
| Reference current time (Qref mAs) | 273 | 120 | 150 |
| Reconstruction kernel | J45 s | H20f | I30f |
| Pitch | 0.55 | 0.5 | 1.3 |
| Contrast agent administration | – | 45 mL (6 mL/s) | 50 mL (5 mL/s) |
| Contrast agent timing | – | 6 s delay | Test bolus time to peak + 12 s |
| Dose length product (mGy · cm) | 540 | 1430 | 370 |
CT computed tomography, Qref quality reference effective tube current-time product (used by Siemens Healthineers)