Table 1:

Outcome of diagnoses on CTA for observers 1 and 2 versus final diagnosis on DSA

CTA	DSA (No.)				Total No.
	Atherosclerotic Cause		Pseudo-Occlusion	Dissection
	Occlusion	High-Grade Stenosis
Observer 1
Atherosclerotic occlusion	10	2	0	0	12
Pseudo-occlusion	0	1	14	6	21
Dissection	0	0	3	10	13
Total	13		17	16	46
Observer 2
Atherosclerotic occlusion	10	3	0	0	13
Pseudo-occlusion	0	0	14	4	18
Dissection	0	0	3	12	15
Total	13		17	16	46