Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lung volumes are low . Pulmonary edema has resolved . There is no pleural effusion or pneumothorax . Heart size is top - normal . Mediastinal and hilar structures are unchanged . The patient has median sternotomy closures and mediastinal clips consistent with coronary artery bypass graft .
    OUTPUT:
    
No pulmonary edema .