Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiomediastinal and hilar contours are normal . The lung volumes are low , with patchy opacities in both lung bases , which could represent atelectasis or aspiration . No pleural effusion or pneumothorax is seen .
    OUTPUT:
    
Mild patchy opacities in both lung bases , right greater than left , may represent atelectasis or less likely aspiration - related changes .