Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Chest PA and lateral radiograph demonstrates dense opacification of the right middle and lower lobe suggesting pneumonia on a background of mild pulmonary edema . Minimally increased retrocardiac opacification likely represents atelectasis . No pleural effusion or pneumothorax evident . Mediastinal and hilar contours are unremarkable . Stable moderate cardiomegaly evident . No pleural effusion or pneumothorax .
    OUTPUT:
    
Right middle and lower lobe opacification concerning for pneumonia on a background of mild pulmonary edema .