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Image-based Wrist Motion Tracking

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Status: Completed

Imaging allows us to measure not only biological shapes, but also their motion and deformation. Such information is essential in computational modeling. We use unsupervised tissue classification to reduce imaging artifacts. As a result, we were able to develop a subvoxel-accurate method for tracking bone-motion from sequences of volume images. Results showed expanded capabilities and average accuracy improvements of 74% over the previous-best technique.


Precision Medicine and Medical Image Analysis


Mary Letera
Liz Marai


Grateful acknowledgments to NSF, NIH, Pixar and Microsoft, who supported Dr. Marai's doctoral work.


Interpolated Wrist Motion
Interpolated Wrist Motion Movie



BBSI: Data-driven Modeling of Joints





G.E. Marai, "Data-driven Predictive Modeling of Diarthrodial Joints", Ph.D. Dissertation, Brown University, Vol. 0(5), pp. 0--0, May 2007. (pdf) (bibtex: Marai-2007-DDP).


G.E. Marai, D.H. Laidlaw, J.J. Crisco, "Super-Resolution Registration Using Tissue-Classified Distance Fields", IEEE Transactions on Medical Imaging, Vol. 25(2), pp. 177--187, Feb 2006. (pdf) (bibtex: Marai-2006-SRR).


G.E. Marai, D.H. Laidlaw, "Markerless inter-subject bone shape matching using 2D projections", MICCAI 2005 short papers, pp. 0--0, 2005. (pdf) (bibtex: Marai-2005-MIS).


G. E. Marai, C. Demiralp, S. Andrews, D. H. Laidlaw, "JointViewer -- an interactive system for exploring orthopedic data", IEEE Visualization 2004 Poster Compendium, pp. 0--0, 2004. (pdf) (bibtex: Marai-2004-JAI).


J.J. Crisco, G.E. Marai, D.H. Laidlaw, D. Moore, E. Akelman, "Kinematic and mechanical changes in the distal radioulnar joint (druj) of patients with malunited distal radius fractures", 49th Annual Meeting of the Orthopaedic Research Society, pp. 0--0, 2003. (pdf) (bibtex: Crisco-2003-KAM).

G.E. Marai, D.H. Laidlaw, J.J. Coburn, M.A. Upal, J.J. Crisco, "A 3D Method for Segmenting and Registering Carpal Bones from CT Volume Images", Annual Meeting of the American Society of Biomechanics, pp. 0--0, 2003. (pdf) (bibtex: Marai-2003-A3M).