Table 4.

Estimated effective doses at default exposure settings for different sizes of body/anatomy (L large, M medium, S small) and at exposures optimised for 3-D paediatric spine imaging with dose reduction factors for all phantom sizes

Phantom diameter (cm)	Protocol	kV	mA	mAs	Effective dose (mSv)	Dose reduction, %
24	M	120	40	160	8.3
24	Low dose	70	20	80	0.4	94.7
16	S	120	32	128	6.3
16	Low dose	80	10	40	0.5	91.7
10	S	120	32	128	5.8
10	Low dose	70	10	40	0.5	92.2