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Extracranial 2D TOF: axial slices at different neck levels, (a) at the neck basis, (b) at midneck level (C5-C6 level), and (c) at an immediately submandibular level (C4-C5 level), showing patency of the IJV system bilaterally, as that of anterior jugular veins (with right side prominence) and vertebral venous drainage.
