Background Transarterial radioembolization (TARE) of liver tumors exposes medical staff to radiation. Comparative data between three microspheres, 90Y-resin, 90Y-glass, and 166Ho-poly-L-lactic acid (PLLA), is lacking. Purpose To evaluate radiation exposure among medical staff in a real-world setting and provide reliable data for involved occupations and microspheres. Materials and Methods This prospective consecutive single-tertiary care center study included ind