Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There are streaky opacities in the lingula , although these were present before . The cardiac , mediastinal and hilar contours appear stable . Flattening of hemidiaphragms suggest background hyperinflation . There is no definite pleural effusion or pneumothorax .
    OUTPUT:
    
Streaky lingular opacities , present before and probably due to minor atelectasis .