Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A vascular stent is again noted in the left brachiocephalic vein and SVC , in unchanged position . Compared to the most recent prior study of ___ , the lung volumes have decreased . There is no new opacity concerning for pneumonia . Linear scarring or atelectasis in the right mid lung field is similar . There is no pleural effusion or pneumothorax . The cardiac and mediastinal contours are stable . There are degenerative changes within the left glenohumeral joint . Old healed right rib fractures are again noted .
    OUTPUT:
    
Decreased lung volumes with no new opacity concerning for pneumonia .