Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Progression of bibasilar atelectasis with possibly mild pleural effusion . Moderate cardiomegaly is unchanged in this patient with prior sternotomy for CABG . Mild volume overload is unchanged . There is no pneumothorax .
    OUTPUT:
    
Increase in mild bibasilar atelectasis . The rest of the exam is unchanged .