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Published on: December 19, 2020
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Best Practice: International Multisociety Consensus Statement for Post-COVID-19 Residual Abnormalities on Chest CT
Soon Ho Yoon1, Jeffrey P Kanne2, Kazuto Ashizawa3
1Department of Radiology, Seoul National University College of Medicine, Seoul National University Hospital, Seoul, Korea.
Radiology
|July 22, 2025
Summary
Residual lung abnormalities on CT scans after COVID-19 infection are common and tend to stabilize over time. A new consensus recommends standardized reporting using the term "post-COVID-19 residual lung abnormality" to avoid misdiagnosis.
Area of Science:
- Radiology
- Pulmonology
- Infectious Diseases
Background:
- Residual lung abnormalities on CT scans are frequently observed after COVID-19 infection.
- These abnormalities can correlate with persistent respiratory symptoms and abnormal pulmonary function tests.
- Current terminology for these findings is inconsistent across publications.
Purpose of the Study:
- To establish a standardized approach for the indication, acquisition, and reporting of residual lung abnormalities detected on CT scans following COVID-19 infection.
- To provide clear guidelines for radiologists and clinicians managing patients with post-COVID-19 lung changes.
Main Methods:
- A multisociety consensus statement developed by 21 thoracic radiologists from three international societies (European Society of Thoracic Imaging, Society of Thoracic Radiology, Asian Society of Thoracic Radiology).
- A two-round survey process was employed to reach consensus on key recommendations.
- Recommendations cover patient selection, imaging protocols, and standardized terminology for reporting.
Main Results:
- Chest CT is recommended for patients with persistent or progressive respiratory symptoms at least 3 months post-infection.
- Low-dose CT protocols (1-3 mSv) are advised for follow-up examinations.
- The Fleischner Society glossary should be used for radiologic descriptors, and the term 'post-COVID-19 residual lung abnormality' is recommended over 'interstitial lung abnormality' to avoid misdiagnosis of interstitial lung disease.
Conclusions:
- Standardized terminology and reporting practices are crucial for accurate interpretation and management of post-COVID-19 residual lung abnormalities.
- This consensus aims to harmonize radiology practices and facilitate research for the significant number of patients affected by these lung changes.
- Adherence to these guidelines will improve consistency in clinical care and research outcomes related to post-COVID-19 lung sequelae.
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