Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are well expanded . There is interval development of asymmetric mild pulmonary edema , right greater than left . Alternatively , this could be a symmetric pulmonary edema with a right lower lobe pneumonia , but this is less likely . There is no pneumothorax or pleural effusion . Cardiomediastinal silhouette is unremarkable .
    OUTPUT:
    
Acute asymmetric pulmonary edema , right greater than left , more likely than mild edema and concurrent right pneumonia .