Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low . There is mild pulmonary edema . Cardiomediastinal silhouette is mildly enlarged , which likely reflects AP position and low lung volumes . There is no pneumothorax or pleural effusion . The stomach is air-filled and distended . Degenerative changes are noted of the right acromioclavicular joint .
    OUTPUT:
    
Low lung volumes . Mild pulmonary edema .