Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Small right and small to moderate left pleural effusions are unchanged . A persistent retrocardiac airspace opacity is most likely due to left lower lobe collapse , but infection is also possible in the appropriate clinical context . There is no pneumothorax . The heart and mediastinum are magnified by the projection . Mild vascular congestion is stable .
    OUTPUT:
    
Stable small right and small to moderate left pleural effusions . Persistent left lower lobe collapse . Infection at the left base is possible in the appropriate clinical context .