Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Aortic stent is re - demonstrated , as also seen on ___ . There is mild to moderate pulmonary edema . More confluent opacity in the inferior right upper lobe as well as in the right lower lobe could relate to fluid overload however , are also concerning for focal sites of infection . No pleural effusion is seen . There is no evidence of pneumothorax . Cardiac and mediastinal silhouettes are grossly stable .
    OUTPUT:
    
Mild to moderate pulmonary edema . More focal sites of opacity in the inferior right upper and right lower lobes raise concern for superimposed infection .