Table 2 Key differences in the different parameters of the commonly used CT scanners
From: Contrast opacification on thoracic CT angiography: challenges and solutions
Collimation | Pitch | Gantry rotation time (s) | Scan delay time (s) | Total scan time (s) | |
|---|---|---|---|---|---|
64 slice | 64 × 0.625 | 0.6–1 | 0.75 | 4.2 | 7–9.4 |
128 slice | 64 × 0.625 | 0.6–1 | 0.40 | 4.2 | 4–7 |
256 slice | 128 × 0.625 × 2 | 0.6–1 | 0.33–0.4 | 4.2 | 3–6 |
Dual source FLASH | 2 × 128 × 0.625 | 1–3.2 | 0.28 | 3–6.0 | 1.1–2 |