Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Patient is status post median sternotomy . Again seen is persistent blunting of the costophrenic angles , prickly on the left , stable . Bibasilar atelectasis / scarring is seen . No definite new focal consolidation is seen . No large pleural effusion is seen . There is no evidence of pneumothorax . The cardiac and mediastinal silhouettes are stable . No overt pulmonary edema is seen .
    OUTPUT:
    
No significant interval change . No overt pulmonary edema .