Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is normal . Mediastinal and hilar contours are unremarkable . Pulmonary vasculature is normal . Linear opacities within the left lower lobe are unchanged , likely atelectasis or scarring . Remainder the lungs are clear . No pleural effusion or pneumothorax is present . Mild degenerative changes are noted in the thoracic spine along with dextroscoliosis of the thoracolumbar spine .
    OUTPUT:
    
No acute cardiopulmonary abnormality .