Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low . A right mid lung opacity is triangular in shape and in an area with multiple overlying osseous structures , not well seen on lateral view . There is mild vascular congestion without evidence of frank pulmonary edema . The mediastinum is somewhat widened and cardiac silhouette is enlarged , accentuated by low lung volumes and AP technique . The hila are normal . There is no pneumothorax or pleural effusion . Extensive degenerative changes are seen in the thoracic spine .
    OUTPUT:
    
Nonspecific right mid lung opacity . If clinical concern for pulmonary embolism , CTA of the chest should be obtained .