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Regression Guided Deformable Models for Segmentation of Multiple Brain ROIs

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Machine Learning in Medical Imaging (MLMI 2016)

Part of the book series: Lecture Notes in Computer Science ((LNIP,volume 10019))

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Abstract

This paper proposes a novel method of using regression-guided deformable models for brain regions of interest (ROIs) segmentation. Different from conventional deformable segmentation, which often deforms shape model locally and thus sensitive to initialization, we propose to learn a regressor to explicitly guide the shape deformation, thus eventually improves the performance of ROI segmentation. The regressor is learned via two steps, (1) a joint classification and regression random forest (CRRF) and (2) an auto-context model. The CRRF predicts each voxel’s deformation to the nearest point on the ROI boundary as well as each voxel’s class label (e.g., ROI versus background). The auto-context model further refines all voxel’s deformations (i.e., deformation field) and class labels (i.e., label maps) by considering the neighboring structures. Compared to the conventional random forest regressor, the proposed regressor provides more accurate deformation field estimation and thus more robust in guiding deformation of the shape model. Validated in segmentation of 14 midbrain ROIs from the IXI dataset, our method outperforms the state-of-art multi-atlas label fusion and classification methods, and also significantly reduces the computation cost.

D. Shen—This work was supported by the National Institute of Health grants 1R01 EB006733.

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Correspondence to Dinggang Shen .

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Wu, Z., Park, S.H., Guo, Y., Gao, Y., Shen, D. (2016). Regression Guided Deformable Models for Segmentation of Multiple Brain ROIs. In: Wang, L., Adeli, E., Wang, Q., Shi, Y., Suk, HI. (eds) Machine Learning in Medical Imaging. MLMI 2016. Lecture Notes in Computer Science(), vol 10019. Springer, Cham. https://doi.org/10.1007/978-3-319-47157-0_29

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  • DOI: https://doi.org/10.1007/978-3-319-47157-0_29

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  • Publisher Name: Springer, Cham

  • Print ISBN: 978-3-319-47156-3

  • Online ISBN: 978-3-319-47157-0

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