Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart is mildly enlarged . The mediastinal and hilar contours appear within normal limits . There is a streaky linear opacity projecting over the left mid lung , probably within the lingula and suggestive of minor atelectasis or scarring . Minimal subpleural thickening at each lung apex is also symmetric and suggestive of minor scarring . There is no pleural effusion or pneumothorax . No free air is identified . Moderate degenerative changes are noted along the mid thoracic spine with small - to - moderate anterior osteophytes . Moderate degenerative changes involve the right acromioclavicular joint . Slight rightward convex curvature is centered along the lower thoracic spine .
    OUTPUT:
    
No evidence of acute cardiopulmonary disease or free air .