Core Concepts
KG-Rank integrates ranking models with a medical knowledge graph to enhance long-answer medical question-answering, improving accuracy and reliability.
Abstract
KG-Rank is a framework that leverages a medical knowledge graph (UMLS) with ranking techniques to refine free-text question-answering in the medical domain. By retrieving triplets from the KG and applying ranking methods, KG-Rank aims to provide more precise answers. The framework shows an improvement of over 18% in ROUGE-L score across four selected medical QA datasets. Additionally, extending KG-Rank to open domains results in a 14% enhancement in ROUGE-L, demonstrating its effectiveness and versatility. The methodology involves entity extraction, relation retrieval, ranking methods, and re-ranking techniques to optimize answer generation using LLMs. Evaluation on various datasets showcases the impact of incorporating external knowledge bases like UMLS in enhancing LLM accuracy and reliability.
Stats
KG-Rank achieves an improvement of over 18% in the ROUGE-L score.
Extending KG-Rank to open domains results in a 14% improvement in ROUGE-L.
Quotes
"KG-Rank is the first application of ranking models combined with KG in medical QA specifically for generating long answers."
"Ranking methods aim to improve factuality and eliminate noise and redundancy in the KG-retrieval stage."
"The re-ranking stage ensures that the most relevant triples are chosen for answer generation."