Fig. 3From: Methodological considerations in region of interest definitions for paraspinal muscles in axial MRIs of the lumbar spineExamples of overlapping regions of interest defined by all 3 raters (red), 2 raters (yellow), or 1 rater (blue) for the multifidus muscle using region of interest definitions from method 1 (a-c) and method 2 (d-f) for muscles with Kjaer grade 0 (a, d), 1 (b, e), and 2 (c, f)Back to article page