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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

CTA	DSA (No.)				Total No.
	Atherosclerotic Cause		Pseudo-Occlusion	Dissection
	Occlusion	High-Grade Stenosis	Pseudo-Occlusion	Dissection
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