Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Compared to the prior study , the right IJ line may have been exchanged . The tip overlies the proximal SVC . The ET tube , left IJ line and NG type tube appear unchanged . No pneumothorax is detected . There is some new subtle confluent opacity in the right perihilar region . Otherwise , I doubt significant interval change . Prominent cardiomediastinal silhouette is unchanged . Upper zone redistribution and diffuse vascular blurring is similar to the prior film , allowing for technique . Increased retrocardiac density with air bronchograms is also unchanged . No gross effusion .
    OUTPUT:
    
Subtle new confluent opacity in the right perihilar region , ? related to subtle progression of CHF findings . Otherwise , I doubt significant interval change . Attention to this area on followup films is requested .