Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Compared to the prior film , there has been slight improvement in CHF findings . Otherwise , I doubt significant interval change . Again seen is a left subclavian central line with tip over distal most SVC . There is cardiomegaly , possibly slightly improved . The cardiomediastinal silhouette is otherwise unchanged . There is upper zone redistribution , but without other evidence of CHF . Minimal patchy opacity at the right base is improved . Minimal linear atelectasis the left lung base is also seen . Left hemidiaphragm remains elevated . Pleural thickening along the left chest wall is again noted . Probable azygos lobe in the right upper zone .
    OUTPUT:
    
Slight interval improvement in CHF findings . Otherwise , I doubt significant interval change .