Table 2:

Scan protocols and CTDI_vol^a

	200 mAs	150 mAs	100 mAs	50 mAs	25 mAs
70 kV	5.71	4.27	2.84	1.41	0.71
80 kV	8.97	6.72	4.47	2.22	1.11
90 kV	13.05	9.78	6.50	3.23	1.62
100 kV	17.69	13.25	8.81	4.38	2.25
100 kV + Sn	1.62	1.22	0.82	0.4	0.2
120 kV	28.41	21.28	14.16	7.03	3.61
150 kV + Sn	10.56	7.91	5.26	2.61	1.34

^aAll CTDI_vol values are converted to a 16-cm phantom.