Production-grade multi-agent AI system for radiology report generation. 4 LangGraph agents (Groq vision + Qdrant RAG + Claude Sonnet report drafting + QA validation) with Grad-CAM XAI heatmaps, mandatory human-in-the-loop, MCP server, GDPR/HIPAA compliance, and full AWS deployment via Terraform. QA score: 0.91.