Author

Yun-Hang Qian

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Jul 2026

Med-OPD: Improving Medical Vision-Language Models via Evidence-Aware On-Policy Distillation

Experiments on OmniMedVQA subsets show that Med-OPD consistently outperforms SFT and standard OPD across CT, MRI, Disease Diagnosis, and Lesion Grading, and demonstrate that evidence-aware distillation can better strengthen medical VLMs'reliance on key visual evidence and improve reliable multimodal medical reasoning.

Yun-Hang Qian, Jiaquan Yu, Jiawei Liu et al. · arXiv.org · 1 citation