Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: ET tube lies approximately 3 .6 cm above the carina . NG tube present , tip over fundus . A left subclavian central line tip overlies proximal SVC . No pneumothorax identified . Again seen is cardiomegaly , similar to prior . Again seen is upper zone redistribution and diffuse vascular blurring . This appears improved compared with ___ and areas of more confluent opacity at the right lung base of improved considerably . No gross right effusion . Again seenis increased retrocardiac density consistent with left lower lobe collapse and / or consolidation , overall similar to the prior study . Small left effusion can not be excluded .
    OUTPUT:
    
Persistent CHF , though this appears slightly improved compared with the prior study . Persistent retrocardiac opacity consistent with left lower lobe collapse and / or consolidation , similar to the prior study .