Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable semi-upright radiograph of the chest demonstrates low lung volumes , which results in bronchovascular crowding . Cardiomegaly is unchanged . Again seen is an opacity in the right lower lung , which is similar to slightly improved from the prior study , and likely represents a combination of pleural effusion and pneumonia . Increased opacification at the left base is also concerning for pneumonia . Mild pulmonary edema is stable .
    OUTPUT:
    
1 . Bibasilar opacities are concerning for pneumonia . 2 . Mild stable pulmonary edema . 3 . Large right pleural effusion .