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

Table 5 Subjective image quality scores for reduced dose C-1, reduced dose C-2, and reduced dose C-3

	C-1		C-2		C-3
Reader 1
Lesions	1 (2/19)	2 (11/19)	1 (5/19)	2 (10/19)	1 (7/19)	2 (9/19)
	3 (6/19)		3 (4/19)		3 (3/19)
Liver margins	1 (8/22)	2 (14/22)	1 (13/22)	2 (9/22)	1 (16/22)	2 (6/22)
Liver parenchyma	1 (1/22)	2 (13/22)	1 (2/22)	2 (14/22)	1 (2/22)	2 (17/22)
	3 (8/22)		3 (6/22)		3 (3/22)
Adrenals	1 (4/22)	2 (13/22)	1 (5/22)	2 (14/22)	1 (7/22)	2 (12/22)
	3 (5/22)		3 (3/22)		3 (3/22)
Bowels	1 (4/22)	2 (14/22)	1 (4/22)	2 (13/22)	1 (5/22)	2 (14/22)
	3 (4/23)		3 (5/23)		3 (3/23)
Reader 2
Lesions	1 (6/20)	2 (9/20)	1 (7/20)	2 (10/20)	1 (13/20)	2 (6/20)
	3 (5/20)		3 (3/20)		3 (1/20)
Liver margins	1 (6/22)	2 (12/22)	1 (7/22)	2 (11/22)	1 (9/22)	2 (11/22)
	3 (4/22)		3 (4/22)		3 (2/22)
Liver parenchyma	1 (2/22)	2 (5/22)	1 (3/22)	2 (6/22)	1 (4/22)	2 (5/22)
	3 (15/22)		3 (13/22)		3 (13/22)
Adrenals	1 (5/22)	2 (8/22)	1 (6/22)	2 (7/22)	1 (9/22)	2 (6/22)
	3 (10/22)		3 (9/22)		3 (7/22)
Bowels	1 (10/22)	2 (10/22)	1 (12/22)	2 (8/22)	1 (13/22)	2 (8/22)
	3 (2/22)		3 (2/22)		3 (1/22)

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.