Table 1.

Acquisition parameters for the variations of slice thickness, position from iso‐center, and reconstruction filter.

Acquisition parameter	Variation of slice thickness	Variation of position from iso‐center	Variation of reconstruction filter
Tube potential	120 kV	120 kV	120 kV
Tube current	200 mA	200 mA	200 mA
Mode	Helical	Helical	Helical
Pitch	0.984	0.984	0.984
Field of view (FOV)	260 mm	260 mm	260 mm
Rotation time	1 s	1 s	1 s
Filter reconstruction	Mid‐sternum	Mid‐sternum	Mid‐sternum, soft tissue, bone, cardiac, and brain
Position	At iso‐center	At iso‐center, 2 and 4 cm above, and 2 and 4 cm below	At iso‐center
Slice thickness	1, 2, 3, 4, and 5 mm	5 mm	5 mm