Table 2.

Data for 4 boards on each sides of the phantom.

Reconstruction	Initial dose	−10% dose	−20% dose	−30% dose
	eAIDR	FIRST	FIRST	FIRST
Tube current (mA)	200	180	160	140
Standard deviation (Hounsfield units)	16.67	16.44	16.37	16.62
Subjective scores
4 mm phantom	3	4	4	5
3 mm phantom	3	4	4	4
2 mm phantom	3	4	4	4