Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Mild cardiomegaly is re- demonstrated . Mediastinal and hilar contours are unremarkable . Pulmonary vascularity is normal . Lungs are clear . No pleural effusion or pneumothorax is seen . Mild degenerative changes are noted in the thoracic spine .
    OUTPUT:
    
No acute cardiopulmonary abnormality .