Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Patient is status post median sternotomy . Heart size is mildly enlarged and dense mitral annular calcifications are noted . The aortic knob is calcified . Mediastinal and hilar contours are unchanged with a small hiatal hernia noted . Pulmonary vasculature is not engorged . Minimal atelectasis is seen in the lung bases without focal consolidation . Blunting of the costophrenic sulci on the lateral view is compatible with subpleural fat deposition , as seen on the CT obtained the same day . No pleural effusion or pneumothorax is demonstrated . Mild degenerative changes are noted within the imaged thoracic spine with slight loss of height at ___ mid thoracic vertebral bodies , unchanged .
    OUTPUT:
    
No acute cardiopulmonary abnormality .