Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are clear without focal consolidation . No pleural effusion or pneumothorax is seen . The cardiac and mediastinal silhouettes are unremarkable . Mild retrolisthesis of T11 on T12 , with endplate sclerosis at the level , is unchanged . Old posterior right second rib fracture is noted .
    OUTPUT:
    
No acute cardiopulmonary process .