Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The ET tube is unchanged , ending at 3 cm from carina bifurcation . The NG tube is unchanged and end in proximal gastric cavity . The Swan - Ganz catheter has been pulled back , ending in proximal main pulmonary artery . Lung volume are slightly increased , with reduced opacification of the right lung mainly for reduced pleural effusion . Persistent atelectasis and small pleural effusion left lung . Heart size is still markedly enlarged .
    OUTPUT:
    
Improvement of the ventilation at the right base with reduced pleural effusion . Unchanged atelectasis and small pleural effusion on the left base . Heart size is still markedly enlarged .