Fig. 1From: Short-term effectiveness of precise safety decompression via double percutaneous lumbar foraminoplasty and percutaneous endoscopic lumbar decompression for lateral lumbar spinal canal stenosis: a prospective cohort studyFive zones of the lateral lumbar spinal canal (LLSC) divided by accurate boundaries. a,b Different zones shown in an artificial model in both medial and lateral views. c schematic diagram of the five zones. The boundaries of each zone is described in the text. The right four axial CT scanning image shows the different views of cross-sections (the red solid lines) and the labeled regions correspond to each zoneBack to article page