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Development of Ultrasound to Measure In-Vivo Dynamic Cervical Spine Intervertebral Disc Mechanics

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Technical Report,27 Dec 2014,26 Dec 2015

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Beth Israel Deaconess Medical Center Boston United States

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We developed a unique dual ultrasound system that can non-invasively measure Intervertebral Disc IVD deformation and mechanical compliance ex-vivo and in-vivo. The system is capable of providing real-time images of IVDs and dynamic vertebral motion during simulated tasks. Vertebrae motion and IVD deformation were measured by tracking the bony surface profiles in consecutive US images. Classical Voigt model and finite element model were built to investigate the transfer function human cadaveric spine functional spine units to account for the differential elasticity during compression or tension. As a portable, low cost imaging modality, the dual ultrasound system quantified cervical spine IVD displacement and the mechanical compliance of a functional spinal unit FSU in response to applied forces. This technology allowed in-vivo evaluation of cervical spine mechanical behavior in dynamic environments where MRI and CT cannot be used.

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