Efficacy of Pulsed Radiofrequency on Cervical 2-3 Posterior Medial Branches in Treating Chronic Migraine: A Randomized, Controlled, and Double-Blind Trial

Figure 2

X-ray photos in the PRF treatments. ((a) and (b)) The C-arm machine was placed in the anteroposterior position and the puncture points were at the C2 level. (c) The C-arm machine was placed in the lateral position. The tip of the needles reached the medial branch of C3 and third ONs (C3 and C2, resp.).

(a)

(b)

(c)