Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Compared to prior , there are indistinct but nodular opacities in the right upper lung as well as in the right lower lobe . The left lung is grossly clear . Left hilus appears fuller on today 's exam compared to ___ . No pleural abnormality is seen . The heart size is top normal and unchanged .
    OUTPUT:
    
Nodular opacities in the right upper lung and right lower lobe . ___ be atypical pneumonia . However , given left hilar fullness , further evaluation with chest CT is recommended .