Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The patient is slightly rotated . Peribronchial infiltration at the left lung base could be due to aspiration . A small left pleural effusion may be present . Post - surgical changes are again noted in the right hemithorax . The right lung is clear . Cardiac and mediastinal silhouettes and hilar contours are stable . No pneumothorax .
    OUTPUT:
    
Left basilar opacity could be aspiration .