Figure 3
From: Clinical results of XMR-assisted percutaneous transforaminal endoscopic lumbar discectomy
Preoperative planning for XMR-guided skin entry point and subsequent needle trajectory (all skin markers - arrows). Different markers at position C are placed during XMR, and one of these markers was selected as the correct entry point, as shown in the picture. Line AB is the midline; CD is the proposed entry point to reach the target; and BC is the distance of the skin entry point from the midline.