Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Previous extensive airspace opacification has nearly resolved . The cardiac , mediastinal and hilar contours are normal . Lung volumes continue to be low .
    OUTPUT:
    
Significant clearing of recent severe lung abnormality of uncertain origin . Findings were relayed to Dr . ___ by Dr . ___ ___ review on ___ at 12 : 15 via telephone .