Table 5:

Comparison of SNR between 2 MRA techniques in the 3 groups^{^a}

Arterial Segment	Group A			Group B			Group C
Arterial Segment	CE-MRA	TR-MRA	P	CE-MRA	TR-MRA	P	CE-MRA	TR-MRA	P
Right brachiocephalic trunk	211.2 ± 50.6	144.0 ± 47.6	.000	203.0 ± 45.3	211.2 ± 61.1	.019	204.0 ± 116.0	230.8 ± 65.9	.011
Right subclavian artery	150.8 ± 41.0	97.8 ± 32.0	.000	144.2 ± 36.6	154.0 ± 81.9	.099	135.2 ± 37.0	167.4 ± 110.7	.000
Left subclavian artery	163.3 ± 35.3	100.9 ± 29.3	.000	157.0 ± 34.0	154.0 ± 40.4	.276	152.3 ± 36.6	174.9 ± 45.7	.000
Right CCA	172.1 ± 45.5	103.9 ± 32.6	.000	164.8 ± 42.1	156.4 ± 48.7	.017	157.1 ± 44.9	173.8 ± 47.3	.000
Right extracranial ICA	190.4 ± 63.9	107.0 ± 38.9	.000	177.4 ± 53.5	166.4 ± 57.4	.003	176.5 ± 54.5	193.1 ± 61.3	.001
Right intracranial ICA	280.1 ± 77.4	136.3 ± 46.6	.000	289.9 ± 172.2	226.3 ± 74.7	.000	274.5 ± 71.3	280.1 ± 77.2	.364
Left CCA	200.6 ± 48.8	112.9 ± 33.3	.000	189.7 ± 45.9	172.2 ± 43.2	.000	183.6 ± 50.1	200.2 ± 52.0	.000
Left extracranial ICA	220.8 ± 66.0	120.1 ± 38.5	.000	204.2 ± 59.3	184.9 ± 62.0	.000	199.8 ± 61.5	224.1 ± 70.8	.000
Left intracranial ICA	300.5 ± 73.2	144.9 ± 47.1	.000	295.3 ± 63.5	240.4 ± 66.1	.000	291.1 ± 70.8	301.7 ± 82.5	.137
Right vertebral artery	165.3 ± 52.9	71.8 ± 27.7	.000	158.4 ± 57.3	115.8 ± 57.9	.000	158.0 ± 55.2	136.2 ± 56.4	.000
Left vertebral artery	169.6 ± 60.7	73.7 ± 25.6	.000	167.4 ± 53.8	122.1 ± 49.8	.000	170.6 ± 55.3	149.1 ± 52.2	.000
Basilar artery	223.2 ± 59.5	80.7 ± 29.5	.000	229.9 ± 55.4	136.1 ± 62.8	.000	230.5 ± 46.9	165.5 ± 54.9	.000