Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The patient is status post median sternotomy , and a prosthetic aortic valve is noted . Lungs are clear without focal consolidation , pleural effusion or pneumothorax . There is no pulmonary edema . Compression deformities of the mid-thoracic spine are noted . Increased AP diameter of the chest may reflect COPD .
    OUTPUT:
    
No acute cardiopulmonary process .