Automatic generation of radiology reports from medical imaging has significant clinical utility. This task requires precise pathology identification and coherent and clinically relevant descriptions. This paper introduces Dual-path Enhanced Language for Medicine, DuEL-Med, a novel architecture that integrates a vision encoder-fed large language model (LLM) with an explicit pathology classification informatics path. A lightweight classification head is fine-tuned via LoRA to produce probabilistic pathological predictions to guide and refine the direct LLM-generated text to produce the final report. Experiments on the large-scale MIMIC-CXR and the smaller IU X-Ray datasets demonstrate DuEL-Med’s adaptive benefits. In MIMIC-CXR, it improves the GREEN score from 0.262 to 0.273 by adding correct findings. In IU X-Ray, it demonstrates robustness gain in correcting hallucinated findings from the baseline model, leading to a 15.4% improvement in high-confidence negative cases. This study underscores the value of integrating explicit clinical classification to create more reliable and context-aware automated reporting systems. The training weight and code is available at https://github.com/jink-ucla/DuEL-Med .

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DuEL-Med: A Dual-Path Enhanced Language Model for Clinically-Aware Radiology Report Generation

  • Jin Kim,
  • Matthew S. Brown,
  • Dan Ruan

摘要

Automatic generation of radiology reports from medical imaging has significant clinical utility. This task requires precise pathology identification and coherent and clinically relevant descriptions. This paper introduces Dual-path Enhanced Language for Medicine, DuEL-Med, a novel architecture that integrates a vision encoder-fed large language model (LLM) with an explicit pathology classification informatics path. A lightweight classification head is fine-tuned via LoRA to produce probabilistic pathological predictions to guide and refine the direct LLM-generated text to produce the final report. Experiments on the large-scale MIMIC-CXR and the smaller IU X-Ray datasets demonstrate DuEL-Med’s adaptive benefits. In MIMIC-CXR, it improves the GREEN score from 0.262 to 0.273 by adding correct findings. In IU X-Ray, it demonstrates robustness gain in correcting hallucinated findings from the baseline model, leading to a 15.4% improvement in high-confidence negative cases. This study underscores the value of integrating explicit clinical classification to create more reliable and context-aware automated reporting systems. The training weight and code is available at https://github.com/jink-ucla/DuEL-Med .