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arXiv 2512.03477cs.CVcs.LG

面向医疗青光眼诊断的公平性感知视觉语言模型微调

Fairness-Aware Fine-Tuning of Vision-Language Models for Medical Glaucoma Diagnosis

Department of Computer Science, University of Rochester, NY, USA(罗切斯特大学计算机科学系);Biostatistics and Health Data Science, School of Medicine, Indiana University, Indianapolis, IN, USA(印第安纳大学医学院生物统计学与健康数据科学系);Department of Computer Science, University of Central Florida, FL, USA(佛罗里达州立大学计算机科学系)

Zijian Gu, Yuxi Liu, Zhenhao Zhang, Song Wang

AI总结:

本文提出公平性感知的低秩适应方法,通过三种机制减少医疗影像诊断中的种族差异,实现高效公平的青光眼诊断。

摘要:

视觉语言模型在医疗影像任务上实现了专家级别的性能,但在不同人种群体间表现出显著的诊断准确性差异。我们引入了面向医疗VLMs的公平性感知低秩适应方法,结合参数效率与显式的公平性优化。我们的关键算法贡献是可微的MaxAccGap损失,它能够实现跨人种群体的准确率平衡的端到端优化。我们提出了三种方法:FR-LoRA将MaxAccGap正则化整合到训练目标中,GR-LoRA应用逆频率加权来平衡梯度贡献,Hybrid-LoRA结合了这两种机制。在10,000张青光眼视网膜图像上进行评估,GR-LoRA将诊断准确性差异减少了69%,同时保持53.15%的整体准确率。消融研究揭示,强正则化强度实现了最优的公平性,同时带来最小的准确率损失,而针对种族的优化实现了60%的差异减少。我们的方法仅需0.24%的可训练参数,使在资源受限的医疗环境中部署公平的医疗AI成为可能。

英文摘要:

Vision-language models achieve expert-level performance on medical imaging tasks but exhibit significant diagnostic accuracy disparities across demographic groups. We introduce fairness-aware Low-Rank Adaptation for medical VLMs, combining parameter efficiency with explicit fairness optimization. Our key algorithmic contribution is a differentiable MaxAccGap loss that enables end-to-end optimization of accuracy parity across demographic groups. We propose three methods: FR-LoRA integrates MaxAccGap regularization into the training objective, GR-LoRA applies inverse frequency weighting to balance gradient contributions, and Hybrid-LoRA combines both mechanisms. Evaluated on 10,000 glaucoma fundus images, GR-LoRA reduces diagnostic accuracy disparities by 69% while maintaining 53.15% overall accuracy. Ablation studies reveal that strong regularization strength achieves optimal fairness with minimal accuracy trade-off, and race-specific optimization yields 60% disparity reduction. Our approach requires only 0.24% trainable parameters, enabling practical deployment of fair medical AI in resource-constrained healthcare settings.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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