RT Journal Article SR Electronic T1 CT-Guided C2 Dorsal Root Ganglion Injection and Radiofrequency Ablation for Cervicogenic Headache JF American Journal of Neuroradiology JO Am. J. Neuroradiol. FD American Society of Neuroradiology SP 434 OP 434 DO 10.3174/ajnr.A8651 VO 46 IS 2 A1 Chazen, J. Levi YR 2025 UL http://www.ajnr.org/content/46/2/434.abstract AB CT-guided injection and radiofrequency ablation (RFA) of the C2 dorsal root ganglion (DRG) is a safe and effective treatment for cervicogenic headache arising from C1–C2 joint arthritis. The C2 nerve root is unique in that it lacks a motor component; RFA can be performed with pain relief in exchange for occipital numbness. This video article outlines the imaging anatomy and technical considerations of this procedure.