Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest demonstrate a linear area of opacification in the right upper lung zone . The left lung is clear . The heart is mildly enlarged . The mediastinal and hilar contours are normal . There is no pleural effusion or pneumothorax . Pleural surfaces are unremarkable .
    OUTPUT:
    
1 . Linear opacity in the right upper lung zone may represent an area of developing consolidation or old scarring , although no prior studies are availabe for comparison . 2 . Mild cardiomegaly . 3 . No pleural effusion . Findings were discussed with Dr . ___ by Dr . ___ ___ the telephone on ___ at 5 : 10 PM , 20 minutes after they were made .