The British Society of Thoracic Imaging (BSTI) guidelines (attached below) have outlined features that define Non COVID:
Radiological Society of North America (RSNA) guidelines (attached below) have outlined features that define Atypical COVID:
The RSNA have also provided some guidance on structuring CT reports for Indeterminate COVID:
“Imaging features are atypical or uncommonly reported for (COVID-19) pneumonia. Alternative diagnoses should be considered.”
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