The proliferation of deep learning applications in healthcare calls for data aggregation across various institutions, a practice often associated with significant privacy concerns. This concern intensifies in medical image analysis, where privacy-preserving mechanisms are paramount due to the data being sensitive in nature. Federated learning, which enables cooperative model training without direct data exchange, presents a promising solution. Nevertheless, the inherent vulnerabilities of federated learning necessitate further privacy safeguards. This study addresses this need by integrating differential privacy, a leading privacy-preserving technique, into a federated learning framework for medical image classification. We introduce a novel differentially private federated learning model and meticulously examine its impacts on privacy preservation and model performance. Our research confirms the existence of a trade-off between model accuracy and privacy settings. However, we demonstrate that strategic calibration of the privacy budget in differential privacy can uphold robust image classification performance while providing substantial privacy protection.

本研究将差分隐私技术引入联邦学习框架以实现隐私保护的医学图像分类，证实了隐私保护与模型准确性之间的权衡存在，但我们证明了差分隐私的隐私预算的战略校准可以保持健壮的图像分类性能同时提供实质性的隐私保护。

透过面纱看世界：联邦学习中的差分隐私在医学影像分类中的应用