Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are lower than before . There is considerable improvement in bilateral pulmonary opacities . Asymmetric density is again noted at the right lung base , but this has improved as well . A right chest tube remains in place . There is a small amount of subcutaneous emphysema on that side . The heart and mediastinal structures are unremarkable and unchanged . An endotracheal tube remains in place .
    OUTPUT:
    
Interval improvement in bilateral pulmonary opacities .