Table 1.

Imaging parameters that were varied across the four scanners.

Imaging variables	Philips brilliance 64 CT	Toshiba aquilion prime 160 CT	GE 16 lightspeed	Siemens sensation 10
Slice thickness (mm)	1, 2, 4, 5	1, 2, 4, 5	1.25, 2.5, 3.75, 5	1, 2, 4, 5
FOV (mm)	125, 500	125, 500	125, 500	125, 500
Tube voltage (kVp)	80, 100, 140	80, 100, 135	80, 100, 140	80, 100, 140
Tube current (effective mAs)	60, 80, 120	60, 80, 120	60, 80, 120	60, 80, 120