Table 2:

Contingency table of residual/recurrent DAVF grading according to technique (4D-MRA and DSA)^{^a}

DSA	4D-MRA
DSA	No Shunt	Type I^{^b}	Type IIa^{^b}	Type IIb^{^c}	Type IIa+b^{^c}	Type III^{^c}	Type IV^{^c}	Type V^{^c}
No shunt	28	0	0	0	1	0	0	0
Type I^{^b}	1	3	0	0	0	0	0	0
Type IIa^{^b}	1	0	3	0	0	0	0	0
Type IIb^{^c}	0	0	1	0	0	0	0	0
Type IIa + b^{^c}	0	0	0	0	0	0	0	0
Type III^{^c}	4	0	0	0	0	4	3	0
Type IV^{^c}	1	0	0	0	0	0	0	0
Type V^{^c}	1	0	0	0	0	0	0	0

↵a Consensus grading according to Cognard et al.⁵
↵b Low bleeding risk.
↵c High bleeding risk.