Chest CT Diagnostic classification system: Non COVID – ICST
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    Chest CT Diagnostic classification system: Non COVID

    The British Society of Thoracic Imaging (BSTI) guidelines (attached below) have outlined features that define Non COVID:

    • Lobar pneumonia
    • Cavitating infections
    • Tree-in bud/ centrilobular nodularity
    • Lymphadenopathy, effusions
    • Established pulmonary fibrosis

    Radiological Society of North America (RSNA) guidelines (attached below) have outlined features that define Atypical COVID:

    • Absence of typical or indeterminate features AND presence of:
    • Isolated lobar or segmental consolidation without GGO
    • Discrete small nodules (centrilobular, “tree- in-bud”)
    • Lung cavitation
    • Smooth interlobular septal thickening with pleural effusion

    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.”

    Chest CT Diagnostic classification system: Non COVID

    The British Society of Thoracic Imaging (BSTI) guidelines (attached below) have outlined features that define Non COVID:

    • Lobar pneumonia
    • Cavitating infections
    • Tree-in bud/ centrilobular nodularity
    • Lymphadenopathy, effusions
    • Established pulmonary fibrosis

    Radiological Society of North America (RSNA) guidelines (attached below) have outlined features that define Atypical COVID:

    • Absence of typical or indeterminate features AND presence of:
    • Isolated lobar or segmental consolidation without GGO
    • Discrete small nodules (centrilobular, “tree- in-bud”)
    • Lung cavitation
    • Smooth interlobular septal thickening with pleural effusion

    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.”

    Chest CT Diagnostic classification system: Indeterminate COVID

    Mark as Understood

    Resources

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      Thoracic Imaging in COVID-19 Infection (BSTI)

      Guidance for the Reporting Radiologist British Society of Thoracic Imaging

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        RSNA Expert Consensus Statement on Reporting Chest CT Findings Related to COVID-19

        The goal of this expert consensus is to help radiologists recognize findings of COVID-19 pneumonia and aid their communication with other healthcare providers, assisting management of patients during this pandemic.

        © Institute of Clinical Science and Technology (ICST) 2020

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