Thorax CT protocol
CT imaging was performed in the supine position with raised arms, and at the end of inspiration.Two radiologists experienced in the field of thorax CT reviewed the thin-section and thick-section CT images respectively and the decision was made. Radiologists have identified the dominant appearances on CT images: ground glass density, crazy-paving pattern, consolidation, and other findings.
All thorax CT images were classified as normal, non-COVID lung findings, compatible with low probability COVID-19, intermediate probability COVID-19, high probability-definite COVID-19 as previously defined (13,21).