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. 2022 Apr;43(4):645–648. doi: 10.3174/ajnr.A7476

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FIG 1. — Left T5 CVF with contralateral venous drainage and subsequent treatment. A, Axial right lateral decubitus CTM image shows dependent layering of contrast on the right side of the subarachnoid space but no leak. B, Axial left lateral decubitus CTM image shows more uniform distribution of contrast within the subarachnoid space following turning of the patient but also abnormal left radicular veins opacified by dense contrast (dashed arrow) and a hyperdense right paravertebral vein (arrow). C, Axial left lateral decubitus CTM MIP image shows transvertebral intraosseous drainage of the CVF to the right side (arrow). D, Axial posttreatment CT shows contrast-opacified fibrin sealant filling the foramen (arrow) and extending into the epidural space of vertebral canal.