Fyllos AH, et al. - Researchers quantified and evaluated the normal relationships between neighboring spinal units using MR imaging indices. In addition, they propose an easy-to-apply-and-reproduce method of estimating the correct amount of distraction when surgically restoring a collapsed intervertebral disc, based on individualized measurements. In this retrospective cross-sectional MR imaging study of 119 adult subjects (aged 18–54, asymptomatic for low back pain), they noted that DHI, Dabbs, Farfan, and mean disc height had a statistically significant correlation with the spinal level and age. Results thus suggest the feasibility of referring to a normal values’ database during preoperative planning of correction of a degenerated intervertebral disc. New anatomical and radiological insight in terms of spinal measurements and their potential correlation with current surgical techniques were provided. In addition, they expressed each intervertebral space as a percentage of its adjacent space, introducing the coefficient α factor for every intervertebral space.