Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The patient is status post median sternotomy and CABG . Mild enlargement of cardiac silhouette is unchanged . The mediastinal and hilar contours are similar with atherosclerotic calcifications of the aortic knob again noted . Pulmonary vasculature is not engorged . Minimal subsegmental atelectasis is seen in the right lung base without focal consolidation . No pleural effusion or pneumothorax is present . No acute osseous abnormality is detected .
    OUTPUT:
    
No radiographic evidence for pneumonia .