Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Ovoid opacity projecting over the right mid lung likely represents fissural fluid and appears similar compared to prior . No new consolidation or pneumothorax is seen . Heart and mediastinal contours are stable . There is mildly increased interstitial prominence compared to prior . Aortic calcification is noted .
    OUTPUT:
    
New mild interstitial prominence , which could represent mild edema or viral process .