Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable AP upright view of the chest provided . There may be mild pulmonary edema , though there is asymmetric opacity in the right lower lung which could reflect a superimposed pneumonia . There is a small right pleural effusion . Upper lungs appear well aerated . The heart and mediastinal contours are stable . Bony structures are intact .
    OUTPUT:
    
Mild pulmonary edema with asymmetric opacity at the right lung base which could represent a superimposed pneumonia . Small right effusion also noted .