Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The patient is status post median sternotomy and coronary artery bypass surgery . A prosthetic aortic valve is noted . There is no focal consolidation , pleural effusion or pneumothorax . The heart is normal in size , and there is no pulmonary edema .
    OUTPUT:
    
No acute cardiopulmonary process .