Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral radiograph demonstrates unremarkable mediastinal , hilar and cardiac contours . Lungs are clear . No pneumothorax evident . Minimal though less apparent left hemidiaphragm elevation again noted . Minimal blunting of the costophrenic angle is likely related to atelectasis and scarring .
    OUTPUT:
    
No significant change .