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Table 2: Detection of nidus remnant on SWAN compared with DSA^{^a}
DSA SWAN Reader 1 SWAN Reader 2 Consensus Reading
Patent Obliterated Patent Obliterated Patent Obliterated
Patent (n = 14) 11 3 11 2 12 2
Obliterated (n = 14) 5 9 3 12 2 12
Sensitivity (%) 68.7 78.6 85.7
Specificity (%) 75 85.7 85.7
PPV (%) 78.6 84.6 85.7
NPV (%) 64.3 80 85.7
Note:—PPV indicates positive predictive value; NPV, negative predictive value.
↵a Prevalence of nidus remnant after SRS for bAVM.

DSA	SWAN Reader 1		SWAN Reader 2		Consensus Reading
DSA	Patent	Obliterated	Patent	Obliterated	Patent	Obliterated
Patent (n = 14)	11	3	11	2	12	2
Obliterated (n = 14)	5	9	3	12	2	12
Sensitivity (%)	68.7		78.6		85.7
Specificity (%)	75		85.7		85.7
PPV (%)	78.6		84.6		85.7
NPV (%)	64.3		80		85.7