Federated Learning Aggregation for Chest X-rays: Comparing Robust Methods and Analyzing the FedHeurAgg Adaptive Heuristic
Published by
NeurIPS (submitted to)
Summary
Benchmarked six FL aggregation strategies for pneumonia detection; introduced and evaluated FedHeurAgg, a novel heuristic. Developed a novel adaptive aggregation method, improving low-heterogeneity accuracy but revealing performance limitations under high skew. Analyzed computational cost, revealing a 3-4x higher overhead in FedHeurAgg compared to baselines, identifying future optimization paths. Investigated data heterogeneity impacts, demonstrating FedTrimmedMean's superior robustness to high non-IID factors in medical datasets.