Table 1.

List of experimental and scan parameters.

Parameter	Value
Tube potential	120 kV
Rotation time	0.5 s
Pitch	0.813
Tube current	8 fixed settings (see Table 2)
Scan length	420 mm
Collimation	40 mm ($0.5\mathrm{mm}\times 80$)
Convolution kernel	FC18
Reconstruction algorithms	(1) FBP; (2) AIDR 3D-mild; (3) AIDR 3-D-standard; (4) AIDR 3D-strong
Slice thickness/interval	$1\mathrm{mm}/1\mathrm{mm}$
Number scans/setting	100