Figure 4
From: Feasibility study of ultrasound-guided percutaneous laser discectomy for cervical radicular pain
Ultrasound-guided cannulation for upper cervical intervertebral space. (a,b) Imaging scan of C5 level, and placement of cannula into the C4/5 disc. (c) Sonography of C4 cervical nerve root. (d) Cannulation pathway for C3/4 intervertebral disc.
