Calibrated Triage, Not Autonomy: Confidence Estimation for Medical Vision-Language Models
A new research paper explores the effectiveness of confidence estimation for medical vision-language models (LVLMs). The study found that while LVLMs can generate fluent and confident answers, they often do so without accurately using the provided medical images, relying instead on language priors. This can lead to trustworthy-looking but incorrect diagnoses. The research evaluated seven confidence estimators across five open-weight LVLMs on three medical datasets, concluding that a calibrated confidence score is crucial for safe deployment, enabling models to triage cases rather than operate autonomously. The findings suggest that current confidence signals are insufficient for full autonomy, highlighting the need for models to abstain from cases where confidence is low. AI
IMPACT Highlights the critical need for reliable confidence scores in medical AI to ensure safe deployment and prevent autonomous decision-making in high-stakes scenarios.