Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The patient is status post coronary artery bypass graft surgery . The heart is moderately enlarged , but the cardiac , mediastinal and hilar contours appear unchanged . Opacification involving each hilum and perihilar regions suggests persistent mild to moderate pulmonary edema , but in addition , there is a focal new right lower lung opacity worrisome for pneumonia , projecting posteriorly over the spine and accordingly probably in the right lower lobe . There is no pneumorthorax or definite pleural effusion .
    OUTPUT:
    
Developing focal opacity in the right lower lobe concerning for pneumonia . Mild - to - moderate pulmonary edema .