Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Right - sided dialysis catheter terminates in the cavoatrial junction / right atrium . No pneumothorax is seen . There is mild pulmonary edema . No large pleural effusion is seen although a very trace pleural effusion is difficult to exclude . The cardiac silhouette is mildly enlarged . The aorta is calcified . Retrocardiac opacity best seen on the lateral view could be due to atelectasis or vascular structures , however , consolidation is not excluded in the appropriate clinical setting .
    OUTPUT:
    
Mild pulmonary edema . Retrocardiac opacity best seen on the lateral view could be due to atelectasis or vascular structures , however , consolidation is not excluded in the appropriate clinical setting .