Automatic atlas-based three-label cartilage segmentation from MR knee images.

Published

Journal Article

Osteoarthritis (OA) is the most common form of joint disease and often characterized by cartilage changes. Accurate quantitative methods are needed to rapidly screen large image databases to assess changes in cartilage morphology. We therefore propose a new automatic atlas-based cartilage segmentation method for future automatic OA studies. Atlas-based segmentation methods have been demonstrated to be robust and accurate in brain imaging and therefore also hold high promise to allow for reliable and high-quality segmentations of cartilage. Nevertheless, atlas-based methods have not been well explored for cartilage segmentation. A particular challenge is the thinness of cartilage, its relatively small volume in comparison to surrounding tissue and the difficulty to locate cartilage interfaces - for example the interface between femoral and tibial cartilage. This paper focuses on the segmentation of femoral and tibial cartilage, proposing a multi-atlas segmentation strategy with non-local patch-based label fusion which can robustly identify candidate regions of cartilage. This method is combined with a novel three-label segmentation method which guarantees the spatial separation of femoral and tibial cartilage, and ensures spatial regularity while preserving the thin cartilage shape through anisotropic regularization. Our segmentation energy is convex and therefore guarantees globally optimal solutions. We perform an extensive validation of the proposed method on 706 images of the Pfizer Longitudinal Study. Our validation includes comparisons of different atlas segmentation strategies, different local classifiers, and different types of regularizers. To compare to other cartilage segmentation approaches we validate based on the 50 images of the SKI10 dataset.

Full Text

Duke Authors

Cited Authors

  • Shan, L; Zach, C; Charles, C; Niethammer, M

Published Date

  • October 2014

Published In

Volume / Issue

  • 18 / 7

Start / End Page

  • 1233 - 1246

PubMed ID

  • 25128683

Pubmed Central ID

  • 25128683

Electronic International Standard Serial Number (EISSN)

  • 1361-8423

Digital Object Identifier (DOI)

  • 10.1016/j.media.2014.05.008

Language

  • eng

Conference Location

  • Netherlands