Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lung volumes are low . The cardiac , mediastinal and hilar contours appear stable including mild cardiac enlargement . A linear opacity projecting over the left mid lung suggests minor atelectasis , but elsewhere , the lungs appear clear . There is no pleural effusion or pneumothorax . Upper thoracic interspaces again appear mild to moderately narrowed . Anterior osteophytes are moderate in size along several lower thoracic interspaces .
    OUTPUT:
    
No evidence of acute disease .