Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral chest radiographs demonstrate unremarkable cardiomediastinal and hilar contours . Lungs are clear . No pleural effusion or pneumothorax evident . No displaced rib fracture is identified . There is straightening of the normal thoracic kyphosis .
    OUTPUT:
    
No rib fractures . Straightening of normal thoracic kyphosis .