OpenRad: a Curated Repository of Open-access AI models for Radiology. - Konstantinos Vrettos; Galini Papadaki; Emmanouil Brilakis; Matthaios Triantafyllou; Dimitrios Leventis; Despina Staraki; Maria Mavroforou; Eleftherios Tzanis; Konstantina Giouroukou; Michail E. Klontzas (CoRR, 2026)