Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Linear opacity at the left lung base suggestive of atelectasis versus scarring . The lungs are otherwise clear . Cardiac silhouette is enlarged , similar in configuration . Increased opacity projecting over the posterolateral left seventh rib with lack of inferior cortical margin . This is in similar region to abnormal uptake on recent bone scan and is likely related to underlying metastasis . No acute osseous abnormalities identified .
    OUTPUT:
    
No acute cardiopulmonary process .