Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Patient is status post median sternotomy and aortic valve replacement . Heart size is normal . Mediastinal and hilar contours are unremarkable . Pulmonary vasculature is normal . Except for minimal subsegmental atelectasis in the right lung base , the lungs are clear without focal consolidation , pleural effusion or pneumothorax . Diffuse sclerotic osseous metastases are again noted within the visualized osseous structures .
    OUTPUT:
    
No acute cardiopulmonary abnormality .