Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Moderate cardiomegaly . Increased opacity in the right greater than left lung field is suggestive of mild - to - moderate pulmonary edema . No pneumothorax . Osseous structures are unremarkable .
    OUTPUT:
    
Increased opacity in the right greater than left lung fields is suggestive of asymmetric pulmonary edema but underlying pneumonia can not be excluded given the asymmetry .