Hybrid Retrieval-Generation Reinforced Agent for Medical Image Report Generation
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Abstract (arXiv)
Generating long and coherent reports to describe medical images poses challenges to bridging visual patterns with informative human linguistic descriptions. We propose a novel Hybrid Retrieval-Generation Reinforced Agent (HRGR-Agent) which reconciles traditional retrieval-based approaches populated with human prior knowledge, with modern learning-based approaches to achieve structured, robust, and diverse report generation. HRGR-Agent employs a hierarchical decision-making procedure. For each sentence, a high-level retrieval policy module chooses to either retrieve a template sentence from an off-the-shelf template database, or invoke a low-level generation module to generate a new sentence. HRGR-Agent is updated via reinforcement learning, guided by sentence-level and word-level rewards. Experiments show that our approach achieves the state-of-the-art results on two medical report datasets, generating well-balanced structured sentences with robust coverage of heterogeneous medical report contents. In addition, our model achieves the highest detection accuracy of medical terminologies, and improved human evaluation performance.
Key facts. Cited by 141 papers in the map (data through 14 Oct 2026). First posted on arXiv 21 May 2018.
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Citing papers per year: 2021: 27; 2022: 17; 2023: 34; 2024: 30; 2025: 18; 2026: 15.
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- 2021VisualGPT: Data-efficient Adaptation of Pretrained Language Models for Image Captioningcited by 191
- 2022Cross-modal Memory Networks for Radiology Report Generationcited by 185
- 2021Exploring and Distilling Posterior and Prior Knowledge for Radiology Report Generationcited by 162
- 2023Interactive and Explainable Region-guided Radiology Report Generationcited by 140
- 2023Dynamic Graph Enhanced Contrastive Learning for Chest X-ray Report Generationcited by 118
- 2023METransformer: Radiology Report Generation by Transformer with Multiple Learnable Expert Tokenscited by 101
- 2022Improving Chest X-Ray Report Generation by Leveraging Warm Startingcited by 95
- 2021Chest ImaGenome Dataset for Clinical Reasoningcited by 90
- 2022Improving the Factual Correctness of Radiology Report Generation with Semantic Rewardscited by 83
- 2022Competence-based Multimodal Curriculum Learning for Medical Report Generationcited by 76
- 2021Radiology Report Generation with a Learned Knowledge Base and Multi-modal Alignmentcited by 73
- 2021Contrastive Attention for Automatic Chest X-ray Report Generationcited by 71
38 more
- 2021Knowledge Matters: Radiology Report Generation with General and Specific Knowledgecited by 68
- 2022AlignTransformer: Hierarchical Alignment of Visual Regions and Disease Tags for Medical Report Generationcited by 65
- 2023Advances in Medical Image Analysis with Vision Transformers: A Comprehensive Reviewcited by 62
- 2023KiUT: Knowledge-injected U-Transformer for Radiology Report Generationcited by 62
- 2022Cross-modal Prototype Driven Network for Radiology Report Generationcited by 59
- 2024State Space Model for New-Generation Network Alternative to Transformers: A Surveycited by 59
- 2023PRIOR: Prototype Representation Joint Learning from Medical Images and Reportscited by 55
- 2021Auto-Encoding Knowledge Graph for Unsupervised Medical Report Generationcited by 47
- 2021Progressive Transformer-Based Generation of Radiology Reportscited by 43
- 2024Automated Radiology Report Generation: A Review of Recent Advancescited by 43
- 2023ORGAN: Observation-Guided Radiology Report Generation via Tree Reasoningcited by 42
- 2021Weakly Supervised Contrastive Learning for Chest X-Ray Report Generationcited by 41
- 2023A Systematic Evaluation of GPT-4V's Multimodal Capability for Medical Image Analysiscited by 37
- 2021What's in a Summary? Laying the Groundwork for Advances in Hospital-Course Summarizationcited by 35
- 2023Utilizing Longitudinal Chest X-Rays and Reports to Pre-Fill Radiology Reportscited by 35
- 2022Explainable Deep Learning Methods in Medical Image Classification: A Surveycited by 32
- 2024MEIT: Multimodal Electrocardiogram Instruction Tuning on Large Language Models for Report Generationcited by 29
- 2022Faithfulness in Natural Language Generation: A Systematic Survey of Analysis, Evaluation and Optimization Methodscited by 27
- 2021Medical-VLBERT: Medical Visual Language BERT for COVID-19 CT Report Generation With Alternate Learningcited by 24
- 2021Automated Generation of Accurate & Fluent Medical X-ray Reportscited by 24
- 2023Unify, Align and Refine: Multi-Level Semantic Alignment for Radiology Report Generationcited by 23
- 2024Fact-Aware Multimodal Retrieval Augmentation for Accurate Medical Radiology Report Generationcited by 23
- 2022CAMANet: Class Activation Map Guided Attention Network for Radiology Report Generationcited by 22
- 2023Multi-task Paired Masking with Alignment Modeling for Medical Vision-Language Pre-trainingcited by 22
- 2023RECAP: Towards Precise Radiology Report Generation via Dynamic Disease Progression Reasoningcited by 22
- 2021AnaXNet: Anatomy Aware Multi-label Finding Classification in Chest X-raycited by 19
- 2021Writing by Memorizing: Hierarchical Retrieval-based Medical Report Generationcited by 19
- 2022Attributed Abnormality Graph Embedding for Clinically Accurate X-Ray Report Generationcited by 17
- 2021Contextualized Keyword Representations for Multi-modal Retinal Image Captioningcited by 16
- 2021Longer Version for "Deep Context-Encoding Network for Retinal Image Captioning"cited by 16
- 2021Variational Topic Inference for Chest X-Ray Report Generationcited by 16
- 2024Radiology Report Generation via Multi-objective Preference Optimizationcited by 16
- 2022A Self-Guided Framework for Radiology Report Generationcited by 15
- 2022RepsNet: Combining Vision with Language for Automated Medical Reportscited by 14
- 2023Dynamic Interactive Relation Capturing via Scene Graph Learning for Robotic Surgical Report Generationcited by 14
- 2023A Systematic Review of Deep Learning-based Research on Radiology Report Generationcited by 14
- 2021Improving Joint Learning of Chest X-Ray and Radiology Report by Word Region Alignmentcited by 13
- 2022DeltaNet:Conditional Medical Report Generation for COVID-19 Diagnosiscited by 13
50 most cited of 141 All 141 (JSON)
- 2026MAC-RRG: Iterative Multi-Agent Collaboration for X-ray Radiology Report Generation20 Sep 2026
- 2026QwenVLConnector: A Fast, Unified Medical VLM Chatbot for Fine-Grained Clinical Perception and Text Generation19 Sep 2026
- 2026Learning to See Locally and Align Clinically with Pathology Semantics for Radiology Report Generation31 Jul 2026
- 2026GTA-Net: Cooperative Game Theory for Vision-Language Alignment in Chest X-Ray Report Generation20 Jun 2026
- 2026Precision Recall Controllable Radiology Report Generation via Hybrid Natural Language and Clinical Reward Learning19 Jun 2026
- 2026SD-GRPO: Verifiable Segment Decomposition for Long-Form Vision-Language Generation2 Jun 2026
- 2026RL-ACRGNet: Reinforcement Learning-Based Chest Radiology Report Generation Network1 Jun 2026
- 2026Not All Tokens Matter Equally: Dynamic In-context Vector Distillation with Decisive-Token Supervision for Long-form Medical Report Generation26 May 2026
- 2026Graph-Augmented Topological Internalization with Dual-Stream Classifiers for Medical Report Generation4 May 2026
- 2026RIHA: Report-Image Hierarchical Alignment for Radiology Report Generation30 Apr 2026
- 2026Structure Observation Driven Image-Text Contrastive Learning for Computed Tomography Report Generation5 Mar 2026
- 2026Automated Histopathology Report Generation via Pyramidal Feature Extraction and the UNI Foundation Model18 Feb 2026
38 more
- 2026MMRad-22K: A Structured Multimodal Evidence Dataset for Chest X-ray Report Generation13 Feb 2026
- 2026Hallucination Mitigating for Medical Report Generation22 Jan 2026
- 2026Web Retrieval-Aware Chunking (W-RAC) for Efficient and Cost-Effective Retrieval-Augmented Generation Systems8 Jan 2026
- 2025EIR: Enhanced Image Representations for Medical Report Generation29 Dec 2025
- 2025MRG-R1: Reinforcement Learning for Clinically Aligned Medical Report Generation18 Dec 2025
- 2025LDP: Parameter-Efficient Fine-Tuning of Multimodal LLM for Medical Report Generation11 Dec 2025
- 2025RadHiera: Semantic Hierarchical Reinforcement Learning for Medical Report Generation13 Nov 2025
- 2025Automated Structured Radiology Report Generation with Rich Clinical Context1 Oct 2025
- 2025Citrus-V: Advancing Medical Foundation Models with Unified Medical Image Grounding for Clinical Reasoning23 Sep 2025
- 2025OraPO: Oracle-educated Reinforcement Learning for Data-efficient and Factual Radiology Report Generation23 Sep 2025
- 2025Vision-Guided Chunking Is All You Need: Enhancing RAG with Multimodal Document Understanding19 Jun 2025
- 2025Balancing Knowledge Delivery and Emotional Comfort in Healthcare Conversational Systems16 Jun 2025
- 2025Boundary-Aware Vision Transformer for Angiography Vascular Network Segmentation15 Jun 2025
- 2025LLaMA-XR: A Novel Framework for Radiology Report Generation using LLaMA and QLoRA Fine Tuning29 May 2025
- 2025Elicit and Enhance: Advancing Multimodal Reasoning in Medical Scenarios29 May 2025
- 2025RADAR: Enhancing Radiology Report Generation with Supplementary Knowledge Injection20 May 2025
- 2025Anatomical Attention Alignment representation for Radiology Report Generation12 May 2025
- 2025DualPrompt-MedCap: A Dual-Prompt Enhanced Approach for Medical Image Captioning13 Apr 2025
- 2025CSTRL: Context-Driven Sequential Transfer Learning for Abstractive Radiology Report Summarization21 Feb 2025
- 2025RadAlign: Advancing Radiology Report Generation with Vision-Language Concept Alignment13 Jan 2025
- 2025GIT-CXR: End-to-End Transformer for Chest X-Ray Report Generation5 Jan 2025
- 2024Radiology Report Generation via Multi-objective Preference Optimization12 Dec 2024
- 2024MedAutoCorrect: Image-Conditioned Autocorrection in Medical Reporting4 Dec 2024
- 2024FG-CXR: A Radiologist-Aligned Gaze Dataset for Enhancing Interpretability in Chest X-Ray Report Generation23 Nov 2024
- 2024Designing a Robust Radiology Report Generation System2 Nov 2024
- 2024See Detail Say Clear: Towards Brain CT Report Generation via Pathological Clue-driven Representation Learning29 Sep 2024
- 2024FODA-PG for Enhanced Medical Imaging Narrative Generation: Adaptive Differentiation of Normal and Abnormal Attributes6 Sep 2024
- 2024Medical Report Generation Is A Multi-label Classification Problem30 Aug 2024
- 2024TRRG: Towards Truthful Radiology Report Generation With Cross-modal Disease Clue Enhanced Large Language Model22 Aug 2024
- 2024Clinical Context-aware Radiology Report Generation from Medical Images using Transformers21 Aug 2024
- 2024Automated Retinal Image Analysis and Medical Report Generation through Deep Learning14 Aug 2024
- 2024A Novel Evaluation Framework for Image2Text Generation3 Aug 2024
- 2024A Labeled Ophthalmic Ultrasound Dataset with Medical Report Generation Based on Cross-modal Deep Learning26 Jul 2024
- 2024Fact-Aware Multimodal Retrieval Augmentation for Accurate Medical Radiology Report Generation21 Jul 2024
- 2024MedRAT: Unpaired Medical Report Generation via Auxiliary Tasks4 Jul 2024
- 2024A Data-Driven Guided Decoding Mechanism for Diagnostic Captioning20 Jun 2024
- 2024Argus: Benchmarking and Enhancing Vision-Language Models for 3D Radiology Report Generation11 Jun 2024
- 2024RadBARTsum: Domain Specific Adaption of Denoising Sequence-to-Sequence Models for Abstractive Radiology Report Summarization5 Jun 2024
50 newest of 141 All 141 (JSON)
- 2023Multi-task Paired Masking with Alignment Modeling for Medical Vision-Language Pre-trainingcited by 22
- 2024Argus: Benchmarking and Enhancing Vision-Language Models for 3D Radiology Report Generationcited by 10
- 2023Multi-modal Pre-training for Medical Vision-language Understanding and Generation: An Empirical Study with A New Benchmarkcited by 5
- 2026QwenVLConnector: A Fast, Unified Medical VLM Chatbot for Fine-Grained Clinical Perception and Text Generationcited by 1
- 2023Improving Medical Visual Representations via Radiology Report Generationcited by 0
- 2023ECAMP: Entity-centered Context-aware Medical Vision Language Pre-trainingcited by 0
- 2024TRRG: Towards Truthful Radiology Report Generation With Cross-modal Disease Clue Enhanced Large Language Modelcited by 0
- 2025DualPrompt-MedCap: A Dual-Prompt Enhanced Approach for Medical Image Captioningcited by 0
- 2025RadHiera: Semantic Hierarchical Reinforcement Learning for Medical Report Generationcited by 0
- 2026Learning to See Locally and Align Clinically with Pathology Semantics for Radiology Report Generationcited by 0
- 2026QwenVLConnector: A Fast, Unified Medical VLM Chatbot for Fine-Grained Clinical Perception and Text Generation19 Sep 2026
- 2026Learning to See Locally and Align Clinically with Pathology Semantics for Radiology Report Generation31 Jul 2026
- 2025RadHiera: Semantic Hierarchical Reinforcement Learning for Medical Report Generation13 Nov 2025
- 2025DualPrompt-MedCap: A Dual-Prompt Enhanced Approach for Medical Image Captioning13 Apr 2025
- 2024TRRG: Towards Truthful Radiology Report Generation With Cross-modal Disease Clue Enhanced Large Language Model22 Aug 2024
- 2024Argus: Benchmarking and Enhancing Vision-Language Models for 3D Radiology Report Generation11 Jun 2024
- 2023ECAMP: Entity-centered Context-aware Medical Vision Language Pre-training20 Dec 2023
- 2023Improving Medical Visual Representations via Radiology Report Generation30 Oct 2023
- 2023Multi-modal Pre-training for Medical Vision-language Understanding and Generation: An Empirical Study with A New Benchmark10 Jun 2023
- 2023Multi-task Paired Masking with Alignment Modeling for Medical Vision-Language Pre-training13 May 2023
- 2021VisualGPT: Data-efficient Adaptation of Pretrained Language Models for Image Captioningcited by 191
- 2022Cross-modal Memory Networks for Radiology Report Generationcited by 185
- 2021Exploring and Distilling Posterior and Prior Knowledge for Radiology Report Generationcited by 162
- 2023Interactive and Explainable Region-guided Radiology Report Generationcited by 140
- 2023Dynamic Graph Enhanced Contrastive Learning for Chest X-ray Report Generationcited by 118
- 2023METransformer: Radiology Report Generation by Transformer with Multiple Learnable Expert Tokenscited by 101
- 2022Improving Chest X-Ray Report Generation by Leveraging Warm Startingcited by 95
- 2021Chest ImaGenome Dataset for Clinical Reasoningcited by 90
- 2022Improving the Factual Correctness of Radiology Report Generation with Semantic Rewardscited by 83
- 2022Competence-based Multimodal Curriculum Learning for Medical Report Generationcited by 76
- 2021Radiology Report Generation with a Learned Knowledge Base and Multi-modal Alignmentcited by 73
- 2021Contrastive Attention for Automatic Chest X-ray Report Generationcited by 71
12 most cited of 126 All 126 (JSON)
- 2026GTA-Net: Cooperative Game Theory for Vision-Language Alignment in Chest X-Ray Report Generation20 Jun 2026
- 2026Precision Recall Controllable Radiology Report Generation via Hybrid Natural Language and Clinical Reward Learning19 Jun 2026
- 2026RL-ACRGNet: Reinforcement Learning-Based Chest Radiology Report Generation Network1 Jun 2026
- 2026Not All Tokens Matter Equally: Dynamic In-context Vector Distillation with Decisive-Token Supervision for Long-form Medical Report Generation26 May 2026
- 2026Graph-Augmented Topological Internalization with Dual-Stream Classifiers for Medical Report Generation4 May 2026
- 2026RIHA: Report-Image Hierarchical Alignment for Radiology Report Generation30 Apr 2026
- 2026Structure Observation Driven Image-Text Contrastive Learning for Computed Tomography Report Generation5 Mar 2026
- 2026Automated Histopathology Report Generation via Pyramidal Feature Extraction and the UNI Foundation Model18 Feb 2026
- 2026MMRad-22K: A Structured Multimodal Evidence Dataset for Chest X-ray Report Generation13 Feb 2026
- 2026Hallucination Mitigating for Medical Report Generation22 Jan 2026
- 2025EIR: Enhanced Image Representations for Medical Report Generation29 Dec 2025
- 2025MRG-R1: Reinforcement Learning for Clinically Aligned Medical Report Generation18 Dec 2025
12 newest of 126 All 126 (JSON)