Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral chest radiographs were provided . There is prominence of the pulmonary vasculature compared to the prior study , consistent with mild pulmonary edema . More confluent opacity at the right lower lung zone may be asymmetric pulmonary edema ; however , an infectious process can not be excluded . There is a new small right pleural effusion . The cardiomediastinal silhouette is unchanged and notable for mild cardiomegaly . Left chest wall pacemaker leads and retained right ventricular lead are unchanged in position . There are no acute bony abnormalities .
    OUTPUT:
    
1 . Mild pulmonary edema . More confluent opacity at right lung base may be asymmetric pulmonary edema ; however , infection can not be excluded . 2 . New small right pleural effusion .