Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Support lines and tubes are unchanged in appearance when compared to the prior study . The cardiomediastinal contour is unchanged with persistent prominence of the bilateral hila . No consolidation , pneumothorax or pleural effusion seen . A focal airspace opacity in the left lower lung is likely due to atelectasis but continued attention on followup .
    OUTPUT:
    
Focal airspace opacity in the left lower lung likely due to atelectasis but continued attention on followup is recommended .