Clinical Study
Ultrasound-Guided versus Fluoroscopy-Guided Deep Cervical Plexus Block for the Treatment of Cervicogenic Headache
Figure 1
(a) The position of the patient. (b) Transverse ultrasound view of C2 spinal process (SP), spinal canal (SC), and vertebral lamina (VL).
| (a) |
| (b) |