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. 2023 Jun;44(6):740–744. doi: 10.3174/ajnr.A7887

Fig 1.

Fig 1.

A 70-year-old man with 18 months of orthostatic headaches and brain MR imaging demonstrating diffuse pachymeningeal enhancement (not shown). Axial and coronal T3D reconstructions from a right lateral decubitus PCD CTM (A and B) at a section thickness of 0.2 mm demonstrate exquisite delineation of tiny veins draining a right T6 CVF (A and B, arrows). Axial and coronal 40-keV reconstructions at the identical time point and window/level settings, both at a section thickness of 0.4 mm (minimum allowable), demonstrate improved conspicuity of the iodine signal within the same veins (C and D, solid arrows) and within the more distal azygous vein (C, dashed arrow), though with slightly diminished anatomic characterization. PCD CT confers excellent spatial resolution and spectral information, which have a complementary role and can both be useful in imaging CVFs. The patient underwent transvenous Onyx embolization of the CVF.