Table 2.

Spetzler-Martin grading score from 4 modalities

Patient No.	Spetzler-Martin grading score
	dMRA	TOF	DMRA plus TOF	DSA
1	×	S2E1	S2E1	S2E1V0
2	S2E0	S2E0	S2E0	S2E0V0
3	S1E1	S1E1	S1E1	S1E1V0
4	S2E1V0	S2E1V0	S2E1V0	S2E1V0
5	S1E1	S1E1	S1E1	S1E1V0
6	S2E1	S2E1	S2E1	S2E1V0
7	×	S1E1*	S1E1	S1E1V0
8	S2E1	S2E1V0	S2E1V0	S2E1V0
9	S2E1V0	S2E1V0	S2E1V0	S2E1V0
10	S2E0	S2E0	S2E0	S2E0V0
11	S1E1	S3E1	S1E1	S1E1V0
12	×	×	×	S1E0V0
13	S2E1V0	S2E1	S2E1V0	S2E1V0
14	S2E1V0	S2E1V0	S2E1V0	S2E1V0
15	S2E0	S2E0	S2E0	S2E0V0
16	S3E1	S3E1V0	S3E1V0	S3E1V0
17	S2E1	S2E1	S2E1	S2E1V1
18	S1E1V0	S2E1V0	S1E1V0	S1E1V0
19	S1E1	S1E1	S1E1	S1E1V0

Note —S=size of cerebral AVM nidus; E= eloquence of adjacent brain; V=venous drainage pattern. Absence of V (in the form of SE) means this method fails to detect venous drainage pattern. ×means failure to detect intracranial AVM lesion.

^*although TOF grading score was consistent with DSA, high intensity on TOF was caused by methemoglobin instead of AVM.