Author

Zhitian Hou

Sun Yat Sen University

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#computer vision Preprint Sep 2026

InfiMed2: A Generalist Medical Multimodal Foundation Model from Contextual Evidence and Stability-Aware Supervision

This work introduces InfiMed2, a family of 4B and 27B generalist medical multimodal foundation models built around stage-aware data design, and curates a 55.68B-token corpus that combines broad clinical knowledge with context-rich biomedical visual evidence through source-specific processing.

Guang-Hao Zhu, Ze-Yu Liu, Zhitian Hou et al. · 0 citations

Preprint Aug 2026

Evaluating Counterfactual Sensitivity to Patient Information in Medication-Safety Reasoning

MedPIC-Bench makes conditional rule application measurable and highlights the limitations of static medication-safety accuracy for assessing patient-specific reliability among medical-specific LLMs, whose average CF performance trails that of general LLMs.

Zhitian Hou, Yuhang Liu, Peng-Kai Wang et al. · 0 citations