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Dynamic Ct For Musculoskeletal Applications: Evaluating Accuracy of The Image Registration Step Authors: B. Keelson, L. Buzzatti, T. Scheerlinck, J. Baeyens, M. De Maeseneer, J. De Mey, E. Cattrysse, G. Van Gompel, J. Vandemeulebroucke and N. Buls Publication Year: 2019
Abstract: Dynamic CT presents the potential to study joints while they undergo motion [1]. Kinematic parameters can also be extracted automatically/semi-automatically from these images using image processing techniques like registration. However, few studies have evaluated the accuracy of the motion parameters extracted via image registration. In this study, a custom-made circular polymethylmethacrylate (PMMA) phantom was designed to undergo controlled rotations. We implemented a two-step image registration approach to recover the induced rotations. Our registration approach was capable of recovering the true rotations with a mean absolute error of 0.52º [95% CI:0.36ºǂ.68º].
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