Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac , mediastinal and hilar contours appear stable . There is no pleural effusion or pneumothorax . Patchy areas of opacity in the lingula and probably right middle lobe appear unchanged . Right mid lung opacification has decreased substantially however . However , there is streaky new opacity in the right upper lobe . Reverse S shaped moderate S shaped thoracolumbar curvature is observed .
    OUTPUT:
    
Vague new right upper lobe opacity , possibly due to atelectasis or airway inflammation ; although probably less likely , early development of pneumonia is not excluded . Decreased right mid lung opacity . Otherwise no significant change .