Study participants
non-traumatic pulmonary disease
The OPTIMACT study included patients 18 years and older, presenting at the ED suspected of non-traumatic pulmonary disease, and requiring chest imaging according to the attending physician. Patients could be self-referred or referred to the ED by their primary care physician or a hospital-based treating physician. Excluded were patients unable to undergo ULDCT or CXR, pregnant women, incapacitated patients, and patients with a life expectancy of less than one month or with other anticipated barriers to 28 days of follow-up data collection. Patients could only participate once [