- Radiopaedia: COVID-19 Imaging and Cases
- Lung Ultrasound Evolution and Scoring in a Patient with COVID-19
- French COVID-19 Radiology Database
- Italian COVID-19 Radiology Database
- A Collection of COVID-19 CXR’s from Spain
- RSNA International COVID-19 Open Radiology Database (RICORD) (Requires Agreement)
- BIMCV-COVID19 Imaging Datasets
- COVID-19: A Systematic Review of Imaging Findings in 919 Patients
- The Role of Imaging in the Management of Suspected or Known COVID-19 Pneumonia: A Multidisciplinary Perspective
- Chest CT in the Emergency Department for Diagnosis of COVID-19 Pneumonia: Dutch Experience
- Additional Datasets: GitHub (CXR + CT), GitHub (CT), Kaggle (CXR)
Findings on initial CT include bilateral multilobar ground-glass opacification (GGO) in a peripheral or posterior distribution, often in the lower lobes and less frequently in the right middle lobe. Less common findings include septal thickening, bronchiectasis, pleural thickening, and subpleural involvement. As disease progresses, pleural effusion, pericardial effusion, lymphadenopathy, cavitation, CT halo sign, and pneumothorax may be seen. Imaging during intermediate-phase disease may show an increase in number and size of GGOs, transformation of GGOs into multifocal consolidative opacities, and the development of crazy paving pattern. The greatest severity of CT findings is around day 10 after symptom onset.
Imaging findings can be variable, with most common patterns including peripheral rounded bilateral ground-glass opacities with possible progression to consolidations later in disease course; “crazy paving” can also be seen. Atypical findings that should prompt consideration of alternative diagnoses include single lobar infiltrate, cavitation, tree-in-bud pattern, and centrilobular nodules. Point-of-care ultrasound is also mentioned as a useful bedside imaging modality for evaluating possible thoracic complications of this disease, such as pneumothorax or pericardial and pleural effusions.
This retrospective, multicenter trial assessed the efficacy of CT chest interpretation in diagnosing COVID-19 relative to PCR testing. More specifically, the authors showed that a particular radiologic scoring system called CO-RADS offers an 86% sensitivity and 81% specificity in the diagnosis of COVID-19. The area under the curve was significantly less for patients with symptom duration <48 hours (0.71) compared with >48 hours (0.87). This study offers validation of the CO-RADS scheme, which, when positive, yielded an odds ratio of 25.9 for testing positive for COVID-19.
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