Problem: Registered nurses (RNs) in Interventional Radiology (IR) are regularly exposed to ionizing radiation. At a large academic medical center, dosimetry data from September to October 2023 indicated poor estimations of actual exposure, as 98.2% of weekly readings measured 0 mREM. Without proper radiation safety practices, staff are at an increased risk of health consequences. Purpose: This quality improvement project implemented an evidence- based practice change, the Radiation Safety Timeout (RST), to improve dosimetry monitoring among IR RNs. To perform the RST, a staff member verbally and visually verified correct lead and dosimetry badge placement prior to the first radiation exposure. Methods: The interdisciplinary team consisted of the project lead, nurse manager, champions, radiation safety committee, and health physicist. The team ensured maintenance of the change and validated survey data. Electronic communication and individual education supplemented the initial staff meeting. 36 IR RNs participated in clinical care and data collection by self-reporting RST and dosimetry usage. Dosimetry data was provided by the health physicist to observe measured exposure levels. Results: RST compliance ranged from 84.21% to 100%, with a median of 100%, while 94.44% of observed cases successfully performed the intervention (n=18). Reported dosimetry utilization ranged from 93.75% to 100%, and direct observations consistently showed correct utilization (n=37). Dosimetry data showed increasing proportions of non-zero measured exposure each month, ending at 6.06% (from 1.8%). Conclusions: These findings suggest that the RST was highly adopted, contributing to dosimetry compliance and increased data capture. Staff interactions provided an opportunity to tailor improvement efforts. Ongoing education will support occupational safety and combat desensitization to the invisible dangers of radiation.