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Updated: Oct 13, 2025

Lung CT Segmentation to Identify Consolidations and Ground Glass Areas for Quantitative Assesment of SARS-CoV Pneumonia
Published on: December 19, 2020
Cannonball appearance, a tricky yet underrated imaging manifestation of COVID-19
Javid Azadbakht1, Hamidreza Talari1, Delbar Rastkhiz1
1Department of Radiology, Faculty of Medicine, Shahid Beheshti Hospital, Kashan University of Medical Sciences, Qotb Ravandi Blvd., 8715981151, Kashan, Iran.
Abstract:
Spreading swiftly across the borders and over the seas, severe acute respiratory syndrome-related coronavirus-2 (SARS-COV-2), as causative pathogen of coronavirus disease 2019 (COVID-19), is currently the main global public health concern. "Cannonball appearance," as a rare and yet underrated CT feature of COVID-19 pneumonia, has been typically linked to certain hematogenous pulmonary metastases and some inflammatory/infection conditions, including tuberculosis, but no other viral or atypical pneumonia. Cannonball appearance can bring diagnostic dilemmas and difficulties in monitoring treatment response in patients with or suspicious for hematogenous pulmonary metastasis. Hereby, we report two cases of COVID-19 delta variant-induced pneumonia manifesting unusually in chest CT scan with cannonball appearance.
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