EviAgent: Evidence-Driven Agent for Radiology Report Generation
This work addresses the need for trustworthy and robust automated radiology reports to reduce radiologists' workload, though it is incremental in improving transparency and performance over existing methods.
The paper tackled the problem of automated radiology report generation by addressing the lack of traceability and external knowledge access in existing models, resulting in EviAgent outperforming generalist and specialized models on datasets like MIMIC-CXR, CheXpert Plus, and IU-Xray.
Automated radiology report generation holds immense potential to alleviate the heavy workload of radiologists. Despite the formidable vision-language capabilities of recent Multimodal Large Language Models (MLLMs), their clinical deployment is severely constrained by inherent limitations: their "black-box" decision-making renders the generated reports untraceable due to the lack of explicit visual evidence to support the diagnosis, and they struggle to access external domain knowledge. To address these challenges, we propose the Evidence-driven Radiology Report Generation Agent (EviAgent). Unlike opaque end-to-end paradigms, EviAgent coordinates a transparent reasoning trajectory by breaking down the complex generation process into granular operational units. We integrate multi-dimensional visual experts and retrieval mechanisms as external support modules, endowing the system with explicit visual evidence and high-quality clinical priors. Extensive experiments on MIMIC-CXR, CheXpert Plus, and IU-Xray datasets demonstrate that EviAgent outperforms both large-scale generalist models and specialized medical models, providing a robust and trustworthy solution for automated radiology report generation.