The goal of this study was to develop a non-invasive MRI technique to measure 3D dynamic internal strains in the intervertebral discs (IVDs) of lumbar spine during loading and recovery phases. For this purpose, a combination of static mechanical loading of the IVD using MR-compatible ergometer and continuous MRI-acquisition with a 3D-GRASP acquisition was used. Data was acquired on five healthy volunteers, and dynamic strains under loading and recovery conditions were calculated in 5-IVD segments from L1/L2 to L5/S1. By measuring temporal evolution of strain during rest, loading and recovery phases, dynamic strain information in the IVD may be investigated.
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