Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size remains mildly enlarged with a left ventricular predominance . The mediastinal and hilar contours are unchanged . Pulmonary vascularity is normal without evidence of pulmonary edema . Linear opacities in the lung bases likely reflect areas of atelectasis and / or scarring . No pleural effusion , focal consolidation or pneumothorax is present . There are multilevel degenerative changes in the thoracic spine . No subdiaphragmatic free air is demonstrated .
    OUTPUT:
    
No acute cardiopulmonary abnormality . No subdiaphragmatic free air .