Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart size is top normal . The hilar and mediastinal contours are within normal limits . A small tent - like opacity at the right cardiophrenic border is not visualized on the lateral view , and may represent focal atelectasis . There is no pneumothorax , focal consolidation , or pleural effusion .
    OUTPUT:
    
Small tent - like opacity at the right cardiophrenic border is not visualized on the lateral view , and may represent focal atelectasis . Follow - up if pertinent symptoms persist .