Non-Invasive Evaluation of the Effect of Stooped Posture on Spinal Intervertebral Discs Using MRI

Abstract

Due to a need of more descriptive exposure assessment of stooped work as it pertains to low back pain and low back disorders, a new evaluation tool has been developed for non-invasive evaluation of the spinal intervertebral disc. This evaluation tool uses magnetic resonance imaging (MRI) in combination with custom analysis software to measure deformation and compare spatial changes in quantitative MR information (i.e., proton density and relaxation constant T2) in intervertebral discs in response to various long duration load exposures. In vitro loading was performed on porcine cervical spine segments to simulate prolonged stooped posture and erect posture. The image analysis tool provides a means of quantitatively comparing the tissue response of these two different loading conditions. The results suggest prolonged stooped posture has a noticeable impact on disc height and disc hydration compared to static erect posture. The results also provide compelling support for the use of such an approach in evaluation of short and long term load exposures in vivo as they influence mechanical and biochemical health of the intervertebral disc.