Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Median sternal wires and a prosthetic aortic valve are unremarkable . Lungs are mildly hyperexpanded . No focal consolidation or pleural effusion . Heart size is normal . No pneumothorax . Small hiatal hernia .
    OUTPUT:
    
Hyperexpanded lungs with no acute cardiopulmonary process .