Fig. 1From: Efficacy and safety of a modified lateral lumbar interbody fusion in L4-5 lumbar degenerative diseases compared with traditional XLIF and OLIF: a retrospective cohort study of 156 casesa Measurement of the size of the space between psoas major muscle and large artery, and the thickness of psoas major muscle by preoperative axial T2-weighted MRI image at surgical segment. b Typical psoas major muscle elevation from axial T2-weighted MRI images at surgical segmentBack to article page