Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Swan - Ganz catheter and enteric tube are not constant position . Moderate cardiomegaly persists . Lung volumes remain low . Right pleural effusion appears smaller although this may be due to more upright positioning . Worsening left retrocardiac opacity may reflect atelectasis or aspiration . The mediastinal and hilar contours are unchanged . There is no pneumothorax . The aortic arch is calcified .
    OUTPUT:
    
1 . Persistent low lung volumes and small right pleural effusion 2 . Worsening left retrocardiac opacity could reflect atelectasis or aspiration .