Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Examination is suboptimal given patient positioning . The cardiac silhouette is unremarkable . There is prominent pulmonary vasculature in comparison to the most recent prior . In addition , a new vague opacity is seen in the right lung base , which may represent atelectasis , although infiltrate is not entirely excluded . No definite pleural effusion or pneumothorax identified .
    OUTPUT:
    
1 . Mild pulmonary edema . 2 . The opacity at the right lung base may represent pneumonia , possibly aspiration status post Dobbhoff removal .