Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size , mediastinal and hilar contours are within normal limits and without change . Small left pleural effusion persists , but adjacent atelectasis has improved . Subtle opacity in the right infrahilar region is new compared to prior chest radiograph and recent abdominal imaging studies , which included the lower chest . There is no right pleural effusion . A feeding tube remains in place , terminating below the diaphragm .
    OUTPUT:
    
1 . Persistent small left pleural effusion . 2 . New subtle right lower lobe opacity , which may reflect aspiration , atelectasis or developing pneumonia .