Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: In comparison to the previous examination , the right lung base opacity is no longer visualized . The cardiomediastinal silhouette is unremarkable . The lungs are otherwise clear .
    OUTPUT:
    
The previously seen opacity at the right lung base is no longer visualized and is likely within the superficial soft tissues and does not represent a pulmonary opacity . The lung fields are otherwise clear .