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FIG 3. A typical case of unilateral VA "occlusive condition." Although the right VA is very narrow and not visualized clearly on MRA (A, arrows), its sufficient outer caliber is confirmed on BPAS-MR imaging (B, arrows). T2-weighted image (C) shows absence of normal "flow void" in the right VA (arrows) that suggests the arterial occlusion. A source image of 3D TOF MRA (D) and a reformatted thick coronal image (E) hardly show the outer diameter of the occluded right VA (D and E, arrows)
