Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are clear aside from minimal bibasilar atelectasis . Left ventricle is again enlarged . There is no pleural effusion or pneumothorax . Elevted right hemidiaphragm again noted . This patient is status post median sternotomy as well as mitral valve replacement . Aorta is tortuous with a calcified aortic knob .
    OUTPUT:
    
No evidence of acute cardiopulmonary process . No evidence of pneumothorax .