716919.fig.004a
(a)
716919.fig.004b
(b)
716919.fig.004c
(c)
716919.fig.004d
(d)
Figure 4: Magnetic resonance angiography ((a): BPAS image) and right vertebral angiogram ((b): ultra-early arterial phase, (c): early arterial phase, (d): slightly late arterial phase) showing retrograde inflow into the pseudolumen.