Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The right subclavian central line tip overlies the proximal SVC , unchanged . Minimal interval change in the appearance of the lungs with low inspiratory volumes , and findings suggestive of pulmonary edema . There is however slightly increased aeration of the right infrahilar region . There is a persisting retrocardiac opacity likely secondary to atelectasis and / or a small effusion . No pneumothorax . The cardiac silhouette is enlarged but unchanged .
    OUTPUT:
    
Slightly increased aeration of the right infrahilar region . Otherwise no significant interval change .