Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is mildly enlarged . The aorta is mildly tortuous with atherosclerotic calcifications noted at the aortic knob . Mediastinal and hilar contours are unremarkable . Pulmonary vasculature is normal . Minimal streaky and linear opacities in the lung bases likely reflect areas of atelectasis . No pleural effusion , focal consolidation or pneumothorax is identified . Mild degenerative changes are seen in the thoracic spine .
    OUTPUT:
    
No acute cardiopulmonary abnormality .