Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiomediastinal and hilar contours are stable with moderate cardiomegaly . Prominence of the superior mediastinum is unchanged . There is no pneumothorax or large pleural effusion . Lung volumes remain low , but there is no new focal consolidation concerning for pneumonia . The upper abdomen is unremarkable .
    OUTPUT:
    
Low lung volumes . No pneumonia .