Table 4a.

Stenosis classifications by MS type using 3D CE MRAV.^*

3D CE MRAV	PP	PP%	SP	SP%	RR	RR%
R Carotid Ectasia	0	0.0%	4	9.1%	2	2.3%
L Carotid Ectasia	2	5.1%	6	13.6%	13	14.9%
R Enhancement Delay	2	5.1%	4	9.1%	1	1.1%
L Enhancement Delay	1	2.6%	1	2.3%	1	1.1%
R Aplasia	0	0.0%	1	2.3%	0	0.0%
L Aplasia	1	2.6%	0	0.0%	0	0.0%
R T1 Atresia	1	2.6%	1	2.3%	0	0.0%
L T1 Atresia	2	5.1%	3	6.8%	1	1.1%
R C6 Atresia	1	2.6%	2	4.5%	0	0.0%
L C6 Atresia	1	2.6%	4	9.1%	4	4.6%
R C2 Atresia	1	2.6%	2	4.5%	2	2.3%
L C2 Atresia	5	12.8%	4	9.1%	5	5.7%
R Diffuse	0	0.0%	0	0.0%	2	2.3%
L Diffuse	3	7.7%	1	2.3%	4	4.6%
R T1 No signal	1	2.6%	2	4.5%	0	0.0%
R C6 No signal	1	2.6%	2	4.5%	0	0.0%
R C2 No signal	0	0.0%	2	4.5%	2	2.3%
L T1 No signal	3	7.7%	3	6.8%	1	1.1%
L C6 No signal	1	2.6%	5	11.4%	4	4.6%
L C2 No signal	3	7.7%	3	6.8%	4	4.6%
R T1 Stenosis	5	12.8%	7	15.9%	16	18.4%
R C6 Stenosis	4	10.3%	4	9.1%	3	3.4%
R C2 Stenosis	0	0.0%	1	2.3%	1	1.1%
L T1 Stenosis	7	17.9%	6	13.6%	20	23.0%
L C6 Stenosis	10	25.6%	5	11.4%	12	13.8%
L C2 Stenosis	2	5.1%	2	4.5%	5	5.7%
R Stenosis*	13	33.3%	15	34.1%	24	27.6%
L Stenosis*	20	51.3%	17	38.6%	38	43.7%

^*The number of patients with stenosis independent of how many criteria were used.