Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Comparison is made to prior examination of ___ . The heart is normal in size . The mediastinal and hilar contours are unremarkable . The pulmonary vasculature is normal . The lungs are clear . The previously identified opacity in the right upper lobe has resolved .
    OUTPUT:
    
Resolution of previously identified abnormality in the right upper lobe .