Klupp E, et al. - In 21 healthy volunteers, researchers examined associations of diffusion tensor imaging (DTI) parameters of the lumbar paraspinal muscles [play an important role in the onset and progression of lower back pain] with isometric strength measurements. They found significant positive correlations between the ratio of extension to flexion (E/F) strength and mean diffusivity (MD), RD and the eigenvalues. According to this prospective study, DTI allowed the identification of differences in muscle microstructure related to back muscle function that cross-sectional area (CSA) and proton density fat fraction (PDFF) did not reflect. DTI can potentially track subtle changes in the composition of back muscle tissue.