Occupational Doses to Medical Staff Performing or Assisting with Fluoroscopically Guided Interventional Procedures

Background: Staff who perform fluoroscopically guided interventional (FGI) procedures are among the most highly radiation-ex-posedgroups in medicine. However, there are limited data on monthly or annual doses (or dose trends over time) for these workers. Purpose: To summarize occupational badge doses (lens dose equivalent and effective dose equivalent values) for medical staff per-formingor assisting with FGI procedures in 3 recent years after accounting for uninformative values and one- versus two-badge monitoring protocol. Materials and Methods: Badge dose entries of medical workers believed to have performed or assisted with FGI procedures were retro-spectivelycollected from the largest dosimetry provider in the United States for 49 991, 81 561, and 125 669 medical staff corre-spondingto years 2009, 2012, and 2015, respectively. Entries judged to be uninformative of occupational doses to FGI procedures-staff were excluded. Monthly and annual occupational doses were described using summary statistics. Results: After exclusions, 22.2% (153 033 of 687 912) of the two- and 32.9% (450 173 of 1 366 736) of the one-badge entries were judged to be informative. There were 335 225 and 916 563 of the two- and one-badge entries excluded, respectively, with minimal readings in the above-apron badge. Among the two-badge entries, 123 595 were incomplete and 76 059 had readings indicating incorrect wear of the badges. From 2009 to 2015 there was no change in lens dose equivalent values among workers who wore one badge (P =.96) or those who wore two badges (P =.23). Annual lens dose equivalents for workers wearing one badge (median, 6.9 mSv; interquartile range, 3.8213.8 mSv; n = 6218) were similar to those of staff wearing two badges (median, 7.1 mSv; interquar-tile range, 4.6211.2 mSv; n = 1449) (P =.18), suggesting a similar radiation environment. Conclusion: These workers are among the highest exposed to elevated levels of ionizing radiation, although their occupational doses are within U.S. regulatory limits. This is a population that requires consistent and accurate dose monitoring; however, failure to return one or both badges, reversal of badges, and improper badge placement are a major hindrance to this goal. (C) RSNA, 2019