Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size and cardiomediastinal contours are normal . Subtle linear and patchy opacity in the right mid lung field is not clearly seen on lateral view and is likely unchanged since at least ___ . This may reflect a confluence of shadows or scarring . No new focal consolidation , pleural effusion , or pneumothorax .
    OUTPUT:
    
No acute cardiopulmonary process .