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