Secure On-Premise Deployment of Open-Weights Large Language Models in Radiology: An Isolation-First Architecture with Prospective Pilot Evaluation. - Sebastian Nowak 001; Jann-Frederick Laß; Narine Mesropyan; Babak Salam; Nico Piel; Mohammed Bahaaeldin; Wolfgang Block; Alois M. Sprinkart; Julian A. Luetkens; Benjamin Wulff; Alexander Isaak (CoRR, 2026)