Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Compared to earlier the same day , I doubt significant interval change . Again seen are low inspiratory volumes and increased retrocardiac density , consistent with left lower lobe collapse and / or consolidation . Also again seen is some increased density in the right cardiophrenic region , unchanged . There is mild vascular plethora and faint hazy density , also similar to the prior study .
    OUTPUT:
    
1 . Possible mild persistent CHF . 2 . Bibasilar collapse and / or consolidation , which is also similar to the prior film . The possibility of associated pneumonic infiltrate can not be entirely excluded , but the appearance is essentially unchanged or slightly improved . 3 . No new infiltrate detected .