Clinical Evidence Navigator

RAG system for querying clinical guidelines with citation-backed, hallucination-mitigated responses. Built with LangGraph, ChromaDB, and FastAPI.

⚠️ Engineering and research project — not medical advice.

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Architecture

PDF Guidelines → Ingestion Pipeline → ChromaDB (bge-small-en-v1.5)
                                           ↓
                              LangGraph Inference Engine
                              (retrieval → reranking → generation)
                                           ↓
                              FastAPI serving layer → Streamlit UI

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Performance

Metric	Before	After	Improvement
End-to-end latency	~358s	~7.1s	>98%
Retrieval latency	tracked
Indexing time	tracked
LLM inference	tracked

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Tech Stack

Python · LangChain · LangGraph · ChromaDB · HuggingFace (bge-small-en-v1.5)
Google Gemini 2.5 Flash · FastAPI · Streamlit · Docker

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Quick Start

git clone https://github.com/cleberfc23/clinical-evidence-navigator
cd clinical-evidence-navigator
docker compose up

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Author

Cleber F. Carvalho