Ultrasonography Compared to Radiographs in the Assessment of Extension of Magnetically Controlled Growing Rods

BACKGROUND: Magnetically controlled growing rods (MCGR) are used in the management of early onset scoliosis. Unlike traditional growing rod spinal systems the theoretical advantage is the fact that the extension of the rod can be conducted in clinic without the need for repeat surgery. This requires repeated radiographs to assess rod extension increasing patient's ionizing radiation exposure. Ultrasound may offer a safe non-invasive alternative. The purpose of this study is to investigate ultrasongraphic measurement of rod extension and compare it to radiographic assessment.

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