Assessment of sub-milli-sievert abdominal computed tomography with iterative reconstruction techniques of different vendors

Table 3 Subjective image quality scores for reduced dose A-1, reduced dose A-2, and reduced dose A-3

	A-1		A-2		A-3
Reader 1
Lesions	1 (7/24)	2 (16/24)	1 (10/24)	2 (13/24)	1 (7/24)	2 (15/24)
	3 (1/24)		3 (1/24)		3 (2/24)
Liver margins	1 (18/22)	2 (4/22)	1 (20/22)	2 (2/22)	1 (17/22)	2 (5/22)
Liver parenchyma	1 (4/22)	2 (15/22)	1 (7/22)	2 (14/22)	1 (5/22)	2 (15/22)
	3 (3/22)		3 (1/22)		3 (2/22)
Adrenals bowels	1 (7/22)	2 (15/22)	1 (11/22)	2 (11/22)	1 (8/22)	2 (14/22)
	1 (7/22)	2 (14/22)	1 (10/22)	2 (12/22)	1 (8/22)	2 (14/22)
	3 (1/23)
Reader 2
Lesions	1 (5/25)	2 (17/25)	1 (8/25)	2 (12/25)	1 (7/25)	2 (13/25)
	3 (3/25)		3 (5/25)		3 (5/25)
Liver margins	1 (10/22)	2 (11/22)	1 (12/22)	2 (10/22)	1 (9/22)	2 (13/22)
	3 (1/22)
Liver parenchyma	1 (2/22)	2 (8/22)	1 (2/22)	2 (10/22)	1 (2/22)	2 (10/22)
	3 (12/22)		3 (10/22)		3 (10/22)
Adrenals	1 (7/22)	2 (12/22)	1 (9/22)	2 (11/22)	1 (7/22)	2 (13/22)
	3 (3/22)		3 (2/22)		3 (2/22)
Bowels	1 (12/22)	2 (8/22)	1 (12/22)	2 (8/22)	1 (10/22)	2 (10/22)
	3 (3/22)		3 (2/22)		3(2/22)

Score (seen by number of lesions or patients/total number of lesions or patients), score of 1 = sufficient, 2 = limited, 3 = unacceptable for clinical diagnostic confidence.