Fig. 3From: Evaluation of the efficacy and safety of conventional and biportal endoscopic decompressive laminectomy in patients with lumbar spinal stenosis (ENDO-B trial): a protocol for a prospective, randomized, assessor-blind, multicenter trial(A) Preoperative magnetic resonance imaging. Red lines indicate the target cutting area for conventional bilateral decompressive laminectomy performed under a microscope. (B) Postoperative well-decompressed stateBack to article page