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Daily Arxiv

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BreastSegNet: Multi-label Segmentation of Breast MRI

Created by
  • Haebom

Author

Qihang Li, Jichen Yang, Yaqian Chen, Yuwen Chen, Hanxue Gu, Lars J. Grimm, Maciej A. Mazurowski

Outline

In this paper, we present BreastSegNet, a multi-label segmentation algorithm for quantitative analysis of breast MRI images. Unlike previous breast MRI segmentation methods that focus on only a few anatomical structures (e.g., fibrous tissue or tumors), BreastSegNet includes nine anatomical structures: fibrous tissue, blood vessels, muscles, bones, lesions, lymph nodes, heart, liver, and implants. The researchers manually annotated 1,123 MRI slices after review and revision by an expert radiologist. After benchmarking nine segmentation models, including U-Net, SwinUNet, UNet++, SAM, MedSAM, and nnU-Net with multiple ResNet-based encoders, nnU-Net ResEncM achieved the highest performance, achieving an average Dice score of 0.694 for all labels. In particular, it achieved Dice scores exceeding 0.73 for heart, liver, muscle, fibrous tissue, and bone, and approached 0.90 for heart and liver. All model code and weights are publicly available, and data will be made public in the future.

Takeaways, Limitations

Takeaways:
We present BreastSegNet, a comprehensive multi-label segmentation algorithm for quantitative analysis of breast MRI.
Contributes to breast cancer diagnosis and treatment planning by enabling accurate segmentation of nine anatomical structures.
We verified the excellent performance of the nnU-Net ResEncM model and made the related code and weights public to ensure the reproducibility and expandability of the research.
Future disclosure of data is expected to facilitate further research and development.
Limitations:
The current dataset consists of 1123 MRI slices, so further studies using larger datasets are needed.
Because the dataset has not yet been made public, verification and use by other researchers are limited.
Performance for certain labels (e.g., lesions, lymph nodes) may be relatively lower than for other labels.
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