Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The patient is status post median sternotomy . Cardiac silhouette size remains mildly enlarged . The aorta is tortuous . Moderate size hiatal hernia is again noted . Hilar contours are within normal limits , and pulmonary vasculature is not engorged . Streaky atelectasis is seen in the lung bases without focal consolidation . Lungs are hyperinflated of suggestive of underlying COPD . No pleural effusion or pneumothorax is present . Compression deformity at the thoracolumbar junction is unchanged , and partially imaged is posterior fusion hardware within the lumbar spine .
    OUTPUT:
    
No acute cardiopulmonary abnormality . Moderate size hiatal hernia .