High Scan Volume with Low Positive Scan Rate in Highest Utilizers: Computed Tomography Pulmonary Angiography in the Emergency Department.

Background: We examined utilization patterns and predictors of computed tomography pulmonary angiography (CTPA) results in the emergency department (ED).

Objectives: We retrospectively determined ED CTPA positive scan rate (PSR) among ED attendings based on a system that grouped attendings into scan quantity categories through >100.

Methods: We manually reviewed all scans ordered in 2017 in EDs in a multisite medical system.