Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiac pacemaker . Shallow inspiration accentuates heart size , pulmonary vascularity . Small left pleural effusion or thickening , similar . Previous tiny pleural effusion has resolved . Heart size has decreased . Left basilar opacities have nearly resolved . Small area of new right basilar opacity , likely atelectasis , consider pneumonitis in the appropriate clinical setting .
    OUTPUT:
    
Small area of new right basilar opacity , likely atelectasis , consider pneumonitis in the appropriate clinical setting .