Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Endotracheal and nasogastric tubes are stable and in appropriate position . There has been significant improvement in engorgement of the pulmonary vascular pedicle , pulmonary edema , and layering right pleural effusion . Lung volumes are low with bibasilar atelectasis . Opacity at the left lung base is persistent . No pneumothorax . Surgical clips overlying the left upper chest are unchanged .
    OUTPUT:
    
1 . Significantly improved pulmonary edema and right pleural effusion since ___ . 2 . Persistent left basilar opacity likely represents combination of atelectasis and residual pulmonary edema , however in the right clinical setting , pneumonia can not be excluded .