Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac silhouette size is top normal . Mediastinal and hilar contours are unremarkable . Lungs are clear without focal consolidation . No pleural effusion or pneumothorax is present . The pulmonary vasculature is normal . A laparoscopic gastric band is noted in standard position . There are mild degenerative changes in the thoracic spine . No free air under the diaphragms .
    OUTPUT:
    
No acute cardiopulmonary abnormality . No free air under the diaphragms .