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Privacy-preserving federated transfer learning for enhanced liver lesion segmentation in PET-CT imaging.

Authors

Kumar R,Zeng S,Kumar J,Mao X

Affiliations (5)

  • International Research Center for Complexity Sciences, Hangzhou International Innovation Institute, Beihang University, Hangzhou, 311115, China; Yangtze Delta Region Institute (Huzhou), University of Electronic Science and Technology of China, Huzhou, 313001, China; Department of Nuclear Medicine, Huzhou Central Hospital, Fifth School of Clinical Medicine of Zhejiang Chinese Medical University, Huzhou, 313001, China. Electronic address: [email protected].
  • Yangtze Delta Region Institute (Huzhou), University of Electronic Science and Technology of China, Huzhou, 313001, China. Electronic address: [email protected].
  • Institute of Big Data Analytics, Dalhousie University, Canada. Electronic address: [email protected].
  • Computer Science Department, Sukkur IBA University, Pakistan. Electronic address: [email protected].
  • Department of Nuclear Medicine, Huzhou Central Hospital, Fifth School of Clinical Medicine of Zhejiang Chinese Medical University, Huzhou, 313001, China. Electronic address: [email protected].

Abstract

Positron Emission Tomography-Computed Tomography (PET-CT) evolution is critical for liver lesion diagnosis. However, data scarcity, privacy concerns, and cross-institutional imaging heterogeneity impede accurate deep learning model deployment. We propose a Federated Transfer Learning (FTL) framework that integrates federated learning's privacy-preserving collaboration with transfer learning's pre-trained model adaptation, enhancing liver lesion segmentation in PET-CT imaging. By leveraging a Feature Co-learning Block (FCB) and privacy-enhancing technologies (DP, HE), our approach ensures robust segmentation without sharing sensitive patient data. (1) A privacy-preserving FTL framework combining federated learning and adaptive transfer learning; (2) A multi-modal FCB for improved PET-CT feature integration; (3) Extensive evaluation across diverse institutions with privacy-enhancing technologies like Differential Privacy (DP) and Homomorphic Encryption (HE). Experiments on simulated multi-institutional PET-CT datasets demonstrate superior performance compared to baselines, with robust privacy guarantees. The FTL framework reduces data requirements and enhances generalizability, advancing liver lesion diagnostics.

Topics

Journal Article

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