Table 1:

Dose parameters

Group	80 kV	100 kV	120 kV	Study Group	Control Group (120 kV)
n	18	25	10	53	45
kV	80	100	120	97 ± 14	120
Reference mAs	210	145	140	166 ± 32	140
Effective mAs	224 ± 14	165 ± 22	144 ± 11	181 ± 37	141 ± 9
CTDIvol, mGy^b	4.2 ± 0.3^a	6.5 ± 0.9^a	9.7 ± 0.7	6.3 ± 2.1^a	9.5 ± 0.6
DLP, mGy cm^b	134.5 ± 19.6^a	208.7 ± 40^a	299.5 ± 54.9	200.6 ± 69.4^a	292.8 ± 46.2

Note:—The Reference mAs are automatically adapted to match the image quality level of 140 mA at 120 kV.
↵a P < .05.
↵b CTDIvol and DLP referenced to 32-cm phantom.