Automated detection and segmentation of diaphyseal bone fragments from registered C-arm images for long bone fracture reduction.

Automated identification, pose and size estimation, and contour extraction of diaphyseal bone fragments can greatly improve the usability of a computer-assisted fluoroscopy-based navigation system for long bone fracture reduction. In this paper, a two step solution is proposed. The pose and size of a diaphyseal fragment are estimated through 3D morphable object fitting using a parametric cylinder model. The result of fragment identification is then fed to a region information based active contour model to extract the fragment contour. Experimental results show a promising accuracy and robustness of the proposed approach.