Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is borderline enlarged . The mediastinal hilar contours are unremarkable . The pulmonary vasculature is not engorged . The lungs are clear . No pleural effusion or pneumothorax is present . There mild degenerative changes seen in the mid thoracic spine .
    OUTPUT:
    
No acute cardiopulmonary abnormality .