Table 6.

Mean HU values and objective image noise in region of interest placed in liver for standard of care filtered back projection and reduced dose iterative reconstruction techniques

		HU values	Objective image noise
Vendor A	SD FBP	104 ± 30	17 ± 3
	RD A-1	93 ± 35	16 ± 4
	RD A-2	97 ± 29	19 ± 4
	RD A-3	98 ± 29 (P = 0.9)	24 ± 5 (P < 0.001)
Vendor B	SD FBP	101 ± 28	26 ± 5
	RD B-1	100 ± 25	29 ± 5
	RD B-2	98 ± 24	14 ± 3
	RD B-3	107 ± 23 (P = 0.3)	33 ± 11 (P < 0.001)
Vendor C	SD FBP	103 ± 28	23 ± 7
	RD C-1	97 ± 26	36 ± 18
	RD C-2	97 ± 26	28 ± 14
	RD C-3	98 ± 25 (P = 0.9)	23 ± 11 (P = 0.016)

FBP: Filtered back projection; SD: Standard of care; RD: Reduced dose.