Table 1.
Procedure | Scale of difficulty for judgement |
All cases | χ2 | p-value | ||
---|---|---|---|---|---|---|
1 | 2 | 3 | ||||
MRA | 6 | 15 | 2 | 23 | ||
S-n3DRA | 17 | 6 | 0 | 23 | 11.118 | 0.003 |
MRA : magnetic resonance angiography, S-n3DRA : source image based new three-dimensional rotational angiography