Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac , mediastinal and hilar contours appear unchanged . The lungs appear hyperinflated . There is no definite pleural effusion or pneumothorax . Lungs are hyperinflated . Prior bilateral rib fractures appear unchanged . Post-traumatic changes and prior open reduction and fixation of the proximal right humerus , partly visualized , also represent unchanged findings .
    OUTPUT:
    
No definite acute process .