Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral chest radiographs demonstrate unremarkable cardiomediastinal and hilar contours . Symmetric biapical thickening is unchanged compared to ___ . Lungs are otherwise clear . No pleural effusion or pneumothorax identified . No displaced rib fractures noted .
    OUTPUT:
    
Normal chest radiograph .