This is a pragmatic stepped-wedge cluster randomized controlled trial to explore variation in doses used for diagnostic CT by pooling radiation dose data across diverse healthcare delivery systems. To compare different strategies for lowering and optimizing dose and identify the barriers and facilitators to implementing successful dose optimization strategies and standardizing practice.
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Change in Mean Effective Dose (ED)
Timeframe: Sites were randomized to 1 of 3 tracks, which determined the timing of intervention: Track A: audit at week 40, MCI at week 68 Track B: audit at week 44, MCI at week 74 Track C: audit at week 53, MCI at week 81
Percentage of CT Scans With an Effective Dose Above Benchmark
Timeframe: Sites were randomized to 1 of 3 tracks, which determined the timing of intervention: Track A: audit at week 40, MCI at week 68 Track B: audit at week 44, MCI at week 74 Track C: audit at week 53, MCI at week 81