期刊
INTERNATIONAL JOURNAL OF APPROXIMATE REASONING
卷 149, 期 -, 页码 39-60出版社
ELSEVIER SCIENCE INC
DOI: 10.1016/j.ijar.2022.06.007
关键词
Medical image analysis; Dempster-Shafer theory; Evidence theory; Belief functions; Uncertainty quantification; Deep learning
资金
- China Scholarship Council [201808331005]
- French Government, through the program Investments for the future [ANR-11-IDEX-0004-02]
An automatic evidential segmentation method based on Dempster-Shafer theory and deep learning is proposed for segmenting lymphomas from PET and CT images. The method combines deep feature extraction and evidential segmentation, and achieves better results than the baseline model and other state-of-the-art models by training the model to minimize the Dice loss function.
An automatic evidential segmentation method based on Dempster-Shafer theory and deep learning is proposed to segment lymphomas from three-dimensional Positron Emission Tomography (PET) and Computed Tomography (CT) images. The architecture is composed of a deep feature-extraction module and an evidential layer. The feature extraction module uses an encoder-decoder framework to extract semantic feature vectors from 3D inputs. The evidential layer then uses prototypes in the feature space to compute a belief function at each voxel quantifying the uncertainty about the presence or absence of a lymphoma at this location. Two evidential layers are compared, based on different ways of using distances to prototypes for computing mass functions. The whole model is trained end-to-end by minimizing the Dice loss function. The proposed combination of deep feature extraction and evidential segmentation is shown to outperform the baseline UNet model as well as three other state-of-the-art models on a dataset of 173 patients. (C) 2022 Elsevier Inc. All rights reserved.
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