Weakly supervised automatic segmentation and 3D modeling of the knee joint from MR images

Amal Amami; Zouhour Ben Azouz

doi:10.1117/12.2050908

24 December 2013 Weakly supervised automatic segmentation and 3D modeling of the knee joint from MR images

Amal Amami, Zouhour Ben Azouz

Author Affiliations +

Proceedings Volume 9067, Sixth International Conference on Machine Vision (ICMV 2013); 90670U (2013) https://doi.org/10.1117/12.2050908
Event: Sixth International Conference on Machine Vision (ICMV 13), 2013, London, United Kingdom

Abstract

Automatic segmentation and 3D modeling of the knee joint from MR images, is a challenging task. Most of the existing techniques require the tedious manual segmentation of a training set of MRIs. We present an approach that necessitates the manual segmentation of one MR image. It is based on a volumetric active appearance model. First, a dense tetrahedral mesh is automatically created on a reference MR image that is arbitrary selected. Second, a pairwise non-rigid registration between each MRI from a training set and the reference MRI is computed. The non-rigid registration is based on a piece-wise affine deformation using the created tetrahedral mesh. The minimum description length is then used to bring all the MR images into a correspondence. An average image and tetrahedral mesh, as well as a set of main modes of variations, are generated using the established correspondence. Any manual segmentation of the average MRI can be mapped to other MR images using the AAM. The proposed approach has the advantage of simultaneously generating 3D reconstructions of the surface as well as a 3D solid model of the knee joint. The generated surfaces and tetrahedral meshes present the interesting property of fulfilling a correspondence between different MR images. This paper shows preliminary results of the proposed approach. It demonstrates the automatic segmentation and 3D reconstruction of a knee joint obtained by mapping a manual segmentation of a reference image.

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Amal Amami and Zouhour Ben Azouz "Weakly supervised automatic segmentation and 3D modeling of the knee joint from MR images", Proc. SPIE 9067, Sixth International Conference on Machine Vision (ICMV 2013), 90670U (24 December 2013); https://doi.org/10.1117/12.2050908

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KEYWORDS

Image segmentation

Magnetic resonance imaging

3D modeling

Image registration

3D image processing

Solids

Cartilage

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