Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Low bilateral lung volumes . There is an opacity in the left peripheral lung base which may reflect a combination of atelectasis / consolidation and a pleural effusion . No pneumothorax is identified . The right lung is clear . The size the cardiac silhouette is enlarged but is likely accentuated by the low lung volumes .
    OUTPUT:
    
Left basal opacity likely reflects a combination of pleural fluid and atelectasis / consolidation .