Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lungs are clear . No focal consolidation , effusion , edema , or pneumothorax . Heart is top - normal in size , unchanged . The descending aorta is tortuous and / or ectatic , unchanged . Mile central pulmonary vascular prominence . No evidence of pneumomediastinum . No subdiaphragmatic free air .
    OUTPUT:
    
1 . No evidence of free air . 2 . Slight prominence of the pulmonary vascular without edema .