Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: An ET tube is present , tip approximately 4 .5 cm above the carina . An OG type tube is present , tip extending beneath diaphragm , off film . A left IJ central line tip overlies the upper right atrium . Again seen is moderate to moderately severe cardiomegaly , similar to the prior film . Sternotomy wires and prosthetic valve again noted . Increased opacity at the left lung base with obscuration of the left costophrenic angle is similar to the prior film . The previous film showed some patchy alveolar opacity at in the left mid zone laterally . This area is obscured by overlying iatrogenic structures on the current film --___ , it appears at least partially improved if not completely resolved . There is a small to moderate layering right pleural fusion , which is probably slightly larger , allowing for differences in technique . There is upper zone redistribution with diffuse vascular blurring , and atelectasis the right lung base .
    OUTPUT:
    
Lines and tubes as described . Note is made that the left IJ line overlies the upper right atrium unchanged . Cardiomegaly , sternotomy wires , and prosthetic valve again noted , unchanged . Patchy opacity left base with left pleural effusion unchanged . Previously seen left lateral mid zone opacities are obscured by overlying materials , but have probably improved . Layering right pleural effusion may be slightly larger . Atelectasis at the right base is similar . CHF , minimally improved .