Table 1 Hyperacute stroke CT scan parameters.
From: Multiphase CT angiography perfusion maps for predicting target mismatch and ischemic lesion volumes
Parameter | Non-contrast CT | CT angiography | CT perfusion |
---|---|---|---|
Tube voltage [kV] | 120 | 120 | 80 |
Tube current [mA] | 125 | ~ 130 intracranial | 190 |
Exposure time [s] | 2 | 0.6 | 0.4 |
Beam collimation width [mm] | 20 | 40 | 40 |
Axial coverage [cm] | 14 | 15 intracranial | 8 |
Scan mode | Axial (shuttle) | Helical | Axial (shuttle) |
Helical pitch | N/A | 0.984 | N/A |
Gantry tilt [°] | 10 to 30 | 0 | 0 |
Field of view [cm] | 25 | 25 | 25 |
Slice thickness [mm] | 5, 0.625 | 0.625 | 5 |
Reconstruction kernel | Standard | Standard | Standard |