Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart is mildly enlarged but unchanged . The mediastinal and hilar contours are within normal limits . There is no evidence of pulmonary edema . Lungs are clear without focal consolidation . No pleural effusion or pneumothorax is present . There are mild degenerative changes in the thoracic spine . The patient is status post right mastectomy .
    OUTPUT:
    
No acute cardiopulmonary abnormality .