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arXiv 2606.07342cs.CLcs.NE
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LLM引导的医疗决策流程进化

LLM-Guided Evolution for Medical Decision Pipelines

Sber AI Lab(Sber AI实验室);AIRI

Ivan Sviridov, Artem Oskin, Ivan Panin, Iaroslav Bespalov, Dmitry Dylov, Ivan Oseledets, Aleksandr Nesterov

AI总结:

提出LLM引导的MAP-Elites进化方法,无需微调即可优化医疗决策流程,在分诊、咨询和图像分类任务中超越手工设计基线。

摘要:

将大型语言模型(LLM)适应临床工作流程通常需要昂贵的微调或手动提示和流程工程。我们研究了LLM引导的MAP-Elites进化作为一种推理时替代方案,用于发现医疗决策策略,并在https://this URL提供实现仓库。我们将紧急分诊、交互式咨询和医学图像分类表述为对可执行工件的进化搜索,这些工件由特定任务的适应度函数优化。在所有三种设置中,进化在实践约束下改进了手工设计的基线。在分诊中,进化程序将Semigran准确率从77.3%提高到87.1%,紧急召回率从0.60提高到0.97,同时改进了安全加权的保留MIMIC-ESI性能。在交互式咨询中,进化策略改进了Llama-3、Qwen-3.5和Gemma-4的准确率-成本前沿,并迁移到保留的iCRAFTMD。在PneumoniaMNIST中,仅提示进化改进了冻结的MedGemma VLM,同时保留了严格的JSON输出。定性分析表明,收益来自可解释的程序级机制、校准的分诊边界、有针对性的证据获取、选择性承诺和面向发现的视觉决策规则,而不仅仅是表面的提示改写。

英文摘要:

Adapting large language models (LLMs) to clinical workflows often requires costly fine-tuning or manual prompt and pipeline engineering. We study LLM-guided MAP-Elites evolution as an inference-time alternative for discovering medical decision strategies and provide an implementation repository at https://github.com/univanxx/llm_guided_evo_medical. We formulate urgency triage, interactive consultation, and medical image classification as evolutionary searches over executable artifacts optimized by task-specific fitness functions. Across all three settings, evolution improves over manually designed baselines under practical constraints. In triage, evolved programs increase Semigran accuracy from $77.3\%$ to $87.1\%$ and emergency recall from $0.60$ to $0.97$, while improving safety-weighted held-out MIMIC-ESI performance. In interactive consultation, evolved policies improve the accuracy--cost frontier across Llama-3, Qwen-3.5, and Gemma-4 and transfer to held-out iCRAFTMD. In PneumoniaMNIST, prompt-only evolution improves frozen MedGemma VLMs while preserving strict JSON outputs. Qualitative analysis shows that the gains come from interpretable program-level mechanisms, calibrated triage boundaries, targeted evidence acquisition, selective commitment, and finding-oriented visual decision rules, rather than superficial prompt rewording alone.

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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