Table 5. Ratings for artifacts. vessel-tissue contrast (VTC) and overall image quality (mean ratings from both readers).

aneurysm	7 Tesla	1.5 Tesla	7 Tesla	7 Tesla	1.5 Tesla	7 Tesla	7 Tesla	1.5 Tesla	7 Tesla
	TOF MRA	TOF MRA	MPRAGE	TOF MRA	TOF MRA	MPRAGE	TOF MRA	TOF MRA	MPRAGE
	artifacts	artifacts	artifacts	VTC	VTC	VTC	image quality	image quality	image quality
1	4.5	5	5	5	3.5	5	4	4.5	4.5
2	4	4.5	5	4.5	3	3.5	4	4	5
3	3.5	5	5	5	4	5	4.5	5	5
4	5	5	5	5	4.5	5	4.5	4.5	5
5	5	5	5	5	4	5	4.5	5	5
6	5	5	5	5	5	5	5	5	5
7	5	3.5	5	5	4	5	4.5	4.5	5
8	5	4	5	5	4	5	5	5	5
9	4	5	5	4.5	5	5	4.5	4.5	5
10	5	5	5	4	5	5	4	4	5
11	5	4.5	5	5	4	5	5	5	5
12	3	4	5	3	5	5	4	4	5
13	3	3.5	5	3	4	4	3	3	5
14	4	5	5	4	4	5	4	4	5
15	4	4	5	4	5	5	4.5	4	5
16	4	4	5	4	4	5	4	4	5
17	4	4	5	4	4	5	4	4	5
18	4	4	5	4	4	5	4	4	5
19	4	4	5	4	4	5	4	4	5
20	4	4	5	4	4	5	4	4	5
mean	4.3	4.4	5.0	4.4	4.2	4.9	4.3	4.3	5.0

5 =  excellent. 4 =  good. 3 =  moderate. 2 =  poor. and 1 =  non-diagnostic vessel delineation.