Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Compared with ___ , there may have been slight interval increase in the opacity at the left lung base . A small left effusion is again seen . On today 's exam , the right pleural effusion may also be slightly smaller . Otherwise , I doubt significant change . No CHF or other areas of infiltrate identified . Sternotomy wires , background cardiomegaly , and background hyperinflation are again noted .
    OUTPUT:
    
Essentially no significant change compare with the prior film . Possible slight increase in the degree of opacity at the left lung base and minimal improvement in the right pleural effusion .