法医病理多模态数据库构建与模型增强式检索的实现OACHSSCD

Objective To construct a multimodal forensic pathology database based on artificial intelli-gence(AI)technology and explore methods for integrating pre-trained models into multimodal data-bases.Methods A hybrid storage architecture consisting of MySQL,Redis and OSS was employed to manage desensitized multimodal data.Data entry was optimized using optical character recognition(OCR)and natural language processing(NLP)technologies.OCR performance was evaluated and opti-mized using cosine distance,character error rate(CER),and word error rate(WER)to meet practical operational requirements.An intelligent retrieval model was developed using the ChatGLM3-6B model and retrieval-augmented generation(RAG)technology.Model performance was evaluated using ranking metrics including Precision@K,Recall@K,discounted cumulative gain(DCG),and normalized dis-counted cumulative gain(NDCG).Results The database demonstrated satisfactory baseline performance.The response times were maintained within 150 ms for single-query condition and within 2 s for multiple-query conditions.The average disk read throughput reached 950 MB/s.In concurrent performance tests,the database achieved a maximum throughput of 1 200 queries per second(QPS),meeting multimodal data management demands.OCR evaluation showed high recognition accuracy;for high-quality docu-ments,the cosine distance,CER,and WER achieved 0.02,1.5%,and 3.2%,respectively.Intelligent re-trieval results indicated that Precision@K remained consistently high(0.69-1.00),while NDCG values remained above 0.87 for all evaluations.When K=100,the NDCG surpassed 0.95 for all queries,meeting expected performance requirements.Conclusion The multimodal forensic pathology database constructed in this study demonstrates good stability and operational efficiency and can meet the requirements of routine forensic practice for multimodal data storage,management,and analysis.The intelligent re-trieval capabilities,based on pre-trained large language models(LLMs),can be applied to conversa-tional information retrieval from forensic reports and related documents,providing a novel approach to the management and analysis of multimodal databases.