Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is a new large air fluid level projecting over the left hemi thorax . The right lung is clear . There is no large pleural effusion or pneumothorax . The cardiac and mediastinal contours are normal .
    OUTPUT:
    
A new air - fluid level projecting over the left hemithorax is concerning for an empyema or an abscess .