Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart size is borderline enlarged . Mediastinal and hilar contours are unremarkable , and the pulmonary vasculature is normal . Lungs are clear without focal consolidation . No pleural effusion or pneumothorax is seen . There are mild degenerative changes in the thoracic spine .
    OUTPUT:
    
No acute cardiopulmonary process .