Dynamic curvature measurement using fibre-optics

Current methods of measuring spinal curvature are limited. Radiographic analysis is associated with significant radiation exposure and clinic based methods, such as inclinometers and goniometers can only resolve static postures [1]. Laboratory systems, capable of dynamic measures are either constrained by line-of-sight or a clearly defined operating field, which may be affected by the presence of metals [2]. There is a need for new methods of dynamic curvature measurement which overcome the limitations outlined above. Fibre-optics has long been used by the animation industry to map body motion. It is feasible that such technology could be used to measure spinal curvature. The aim of this study is to determine the reliability of using fibre-optic sensors to dynamically measure lumbar curvature and its accuracy compared to a video based method (Vicon).