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News/From Reward Signal to Visual Utility: A Controlled Audit of Medical VLM Post-Training
arxiv
PublishedSeptember 29, 2026 at 4:00 AM
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From Reward Signal to Visual Utility: A Controlled Audit of Medical VLM Post-Training

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arXiv:2609.31450v1 Announce Type: cross Abstract: Medical vision-language model (VLM) post-training is commonly evaluated through answer accuracy. We examine how changes in accuracy and training objectives relate to image-conditioned decisions in a controlled Qwen2.5-VL-3B study on PMC-VQA. We compa

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