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A Novel Focal Tversky Loss Function With Improved Attention U-Net for Lesion Segmentation

Abraham, Nabila, Khan, Naimul Mefraz·2019·2019 IEEE 16th International Symposium on Biomedical Imaging (ISBI 2019)

Abstract

We propose a generalized focal loss function based on the Tversky index to address the issue of data imbalance in medical image segmentation. Compared to the commonly used Dice loss, our loss function achieves a better trade off between precision and recall when training on small structures such as lesions. To evaluate our loss function, we improve the attention U-Net model by incorporating an image pyramid to preserve contextual features. We experiment on the BUS 2017 dataset and ISIC 2018 dataset where lesions occupy 4.84% and 21.4% of the images area and improve segmentation accuracy when compared to the standard U-Net by 25.7% and 3.6%, respectively.

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Metadata

Authors
Abraham, N., & Khan, N. M.
Venue
2019 IEEE 16th International Symposium on Biomedical Imaging (ISBI 2019)
Publisher
IEEE
Published
2019-04
Pages
683-687
OpenAlex
W2962767316
Cited by
873
References
16
FWCI
31.79
Type
conference paper
Language
en
Open access
closed

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CoChat. (2026). Citation check: A Novel Focal Tversky Loss Function With Improved Attention U-Net for Lesion Segmentation. https://app.cochat.ai/papers/10.1109/isbi.2019.8759329
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Abraham, N., & Khan, N. M. (2019). A Novel Focal Tversky Loss Function With Improved Attention U-Net for Lesion Segmentation. 2019 IEEE 16th International Symposium on Biomedical Imaging (ISBI 2019). https://doi.org/10.1109/isbi.2019.8759329

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