Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable single frontal chest radiograph was obtained . The patient is status post extubation and removal of NG tube . A right IJ terminates in the right atrium . There is a persistent opacity at the left lung base with compressive atelectasis . Subsegmental atelectasis is also present in left mid lung zone . The pulmonary edema has improved . The heart size remains borderline enlarged with mild pulmonary vascular congestion . There is no pneumothorax .
    OUTPUT:
    
1 . Persistent opacity at the left lung base , likely secondary to a layering effusion with atelectasis . 2 . Interval improvement in pulmonary edema with persistent mild pulmonary vascular congestion and enlarged cardiac silhouette .