Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart is top normal in size . Mediastinal contour is unremarkable . The aorta is tortuous . Increased opacity at the right lung base medially has been present on prior but is slightly more conspicuous on the current exam . There is right and left basal atelectasis as well as a small right pleural effusion . There is no appreciable left pleural effusion . No bony abnormalities are noted .
    OUTPUT:
    
Increased right basilar opacity , potentially atelectasis but infection is not excluded . Small right - sided pleural effusion .