Table 1.

Summary of vendor scan parameters. All data were reconstructed using FBP algorithm and the most commonly used standard reconstruction kernel innate to each scanner at the time of scanning

Scanner	Recon kernel	Collimation	kVp (kV)	CTDI dose (mGy)			Slice thickness (mm)	Slice spacing (mm)
				1.5	3	6
1	Standard	64 × 0.625	100	x	x	x	1.25	1.0
			120	x	x	x
2	Standard B	64 × 0.75	120		x		1.0	1.0
3	B35f	64 × 0.60	100	x	x	x	1.0	0.5
			120	x	x	x
			140	x	x	x
4	FC17	80 × 0.50	100		x	x	1.0	0.8
			120		x	x
			135		x	x