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Study Flow Diagram. Facility PE volume is defined as the relative percent of CDS-eligible cases at treating facility on day of enrollment. Facility Volume refers to the ED patient volume in the facility at the time of imaging result. Facility Acuity refers to the number of ED patients with an Emergency Severity Index of 1 present at the time of imaging result. PESI: Pulmonary Embolism Severity Index, PE: Pulmonary Embolism.
