Fig. 8From: Kambin's triangle-related data based on magnetic resonance neurography and its role in percutaneous transforaminal endoscopic lumbar interbody fusionPercentage of the sample size of Group A and Group B is classified by the width of the secure region in the total sample size at each lumbar intervertebral space. The samples with the width of the secure region longer than the width of the cage were classified into the safety group (Group A); the other samples were classified as the unsafe group (Group B)Back to article page