Table 2:

Summary statistics for scores of image quality with and without ROI-DRI application

Visibility of	ROI-DRI Applied	Rater 1 Frequency of Scores^{^a}			Rater 2 Frequency of Scores^{^a}			Rater 1			Rater 2
Visibility of	ROI-DRI Applied	1	2	3	1	2	3	Mean/Median	SD	P Value	Mean/Median	SD	P Value
(C1)^{^b}	Yes	0	14	6	0	16	4	2.30/2.0	0.47	.75	2.20/2	0.41	1.00
(C1)^{^b}	No	2	8	10	0	16	4	2.40/2.5	0.68		2.20/2	0.41
(C2)^{^b}	Yes	1	9	10	0	15	5	2.45	0.60	.77	2.25	0.44	.62
(C2)^{^b}	No	1	7	12	0	17	3	2.55	0.60		2.15	0.37
(C3)^{^b}	Yes	1	13	6	1	16	3	2.25/2	0.55	1.00	2.10	0.45	1.00
(C3)^{^b}	No	2	10	8	1	16	3	2.30/2	0.66		2.10	0.45
(C4)^{^b}	Yes	1	7	12	0	13	7	2.55	0.60	1.00	2.35	0.49	.12
(C4)^{^b}	No	2	6	12	0	17	3	2.50	0.69		2.15	0.37
(C5)^{^b}	Yes	1	14	5	0	16	4	2.20/2	0.52	.53	2.20/2	0.41	.62
(C5)^{^b}	No	1	17	2	2	17	1	2.05/2	0.39		1.95/2	0.39
(C6)^{^c}	Yes	16	35	9	15	40	5	1.88/2	0.64	.09	1.83/2	0.56	.47
(C6)^{^c}	No	6	46	8	12	43	5	2.03/2	0.49		1.88/2	0.52
(C7)^{^b}	Yes	2	13	5	0	17	3	2.15/2	0.59	1.00	2.15/2	0.37	.37
(C7)^{^b}	No	3	12	5	2	16	2	2.10/2	0.64		2.00/2	0.46
(C8)^{^b}	Yes	0	7	13	0	10	10	2.65/3	0.49	.62	2.50/2.5	0.51	.5
(C8)^{^b}	No	0	5	15	0	12	8	2.75/3	0.44		2.40/2.5	0.50

↵a Image-quality scores: 1 = unacceptable, 2 = acceptable, 3 = high quality.
↵b A total of 10 aneurysms were treated. Each treated aneurysm (ROI-DRI or standard) had 1 C1/C2/C3/C4/C5/C7/C8 criterion to rate and 3 C6 criteria (because it appears thrice on the basis of the treatment stage, Table 1). Thus, 10 C1/C2/C3/C4/C5/C7 C8 criteria were rated by each rater for 10 aneurysms that were treated by either the standard or ROI-DRI approach. Because each image was shown twice to a rater, it resulted in the rating of 20 C1/C2/C3/C4/C5/C7/C8 criteria each in the ROI-DRI and standard images.
↵c The C6 count is 60 because the C6 criterion appears thrice on the basis of the treatment stage.