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arXiv 2605.12917cs.CVcs.LG

自适应置信区间用于可靠且可解释的医学图像分类

Adaptive Conformal Prediction for Reliable and Explainable Medical Image Classification

Faculty of Computer Science, Universitas Brawijaya(博雅大学计算机科学学院)

One Octadion, Novanto Yudistira, Lailil Muflikhah

AI总结:

本文提出自适应Lambda准则改进RAPS,提升医学图像分类的可靠性与可解释性,实验表明其在跨域验证中表现优异。

摘要:

医学影像深度学习模型常表现出过度自信,导致在模糊诊断场景中存在安全隐患。尽管置信区间(CP)提供分布无关的统计保证,但标准方法如正则化自适应置信区间(RAPS)优化平均效率,可能掩盖在困难输入上的严重失败。我们提出自适应Lambda准则用于RAPS,以最小化预测集大小分层中的最坏覆盖违规情况。在OrganAMNIST(58,850腹部CT图像,11类)上,标准大小优化的RAPS收敛到近确定性行为,在不确定样本上存在分层不足覆盖,而我们的方法实现了95.72%的全局覆盖,平均集大小为1.09,并在所有分层中至少达到90%的覆盖。跨域验证在PathMNIST(107,180病理图像,9类)上证实了其泛化能力。定量Grad-CAM分析(rho = -0.30,p < 1e-22)显示,多标签预测对应于对解剖学模糊区域的聚焦关注。这些结果表明,所提出的方法在保持效率的同时提高了可靠性,使其适用于安全关键的医疗AI应用。

英文摘要:

Deep learning models for medical imaging often exhibit overconfidence, creating safety risks in ambiguous diagnostic scenarios. While Conformal Prediction (CP) provides distribution-free statistical guarantees, standard methods such as Regularized Adaptive Prediction Sets (RAPS) optimize for average efficiency and can mask severe failures on difficult inputs. We propose an Adaptive Lambda Criterion for RAPS that minimizes the worst-case coverage violation across prediction set size strata. On OrganAMNIST (58,850 abdominal CT images, 11 classes), standard size-optimized RAPS converges to near-deterministic behavior with stratified undercoverage on uncertain samples, while our method achieves 95.72 percent global coverage with average set size 1.09 and at least 90 percent coverage across all strata. Cross-domain validation on PathMNIST (107,180 pathology images, 9 classes) confirms generalizability. Quantitative Grad-CAM analysis (rho = -0.30, p < 1e-22) shows that multi-label predictions correspond to focused attention on anatomically ambiguous regions. These results demonstrate that the proposed method improves reliability while maintaining efficiency, making it suitable for safety-critical medical AI applications.

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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