Fig. 3
From: Pulmonary cavity with black sputum in COVID-19-Pneumoconiosis: a case report
A cavity appears in high-density mass shadows. 2023.2 Provincial Fourth People’s Hospital
Fig. 3 | BMC Pulmonary Medicine
From: Pulmonary cavity with black sputum in COVID-19-Pneumoconiosis: a case report
A cavity appears in high-density mass shadows. 2023.2 Provincial Fourth People’s Hospital