241 Low-dose-CT versus X-ray in patients suspected of pulmonary disease ACS without troponin 6 (0.5) 6 (0.5) 7 (0.6) 6 (0.5) Aspiration pneumonia 8 (0.7) 6 (0.5) 5 (0.4) 4 (0.3) Atelectasis 5 (0.4) 1 (0.09) 1 (0.1) 1 (0.09) Pleuritis sicca 3 (0.3) 0 (0.0) 2 (0.2) 1 (0.09) Mediastinal tumour 0 (0.0) 2 (0.2) 0 (0.0) 1 (0.09) Acute chest syndrome 1 (0.1) 1 (0.09) 2 (0.2) 2 (0.2) Radiation pneumonia 0 (0.0) 1 (0.09) 1 (0.1) 1 (0.09) ULDCT: Ultra-low-dose chest computed tomography, CXR: Chest X-ray, COPD: Chronic obstructive pulmonary disease, CF: Cystic fibrosis, ACS: acute coronary syndrome a Values are numbers (percentages). b Patients could have more than one diagnosis. c (Possible) influenza A/ B: at ED discharge a diagnosis of possible influenza A/B was assigned if a patient was treated for influenza A/B awaiting the results of the PCR test. At day 28 a diagnosis of influenza A/B was assigned to PCR positive patients accordingly. 9
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