Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single portable upright frontal image of the chest . There has been interval increase in the opacity of the right lung base , which could represent atelectasis but is concerning for pneumonia or aspiration . The pulmonary vasculature is slightly more prominent than on prior exam and there are increased interstitial markings , consistent with mild pulmonary edema . There is no pleural effusion or pneumothorax . The cardiomediastinal silhouette is unremarkable .
    OUTPUT:
    
1 . Increased right lung base opacity , which may represent atelectasis but would be concerning for pneumonia or aspiration in the right clinical setting . 2 . Increased mild pulmonary edema .