Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP single view of the chest shows interval improvement of neoesophagus distention with resolution of air - fluid level . The collection of contrast in the distal portion of the neoesophagus has reduced , although present since ___ and concerning for obstruction at the lower neoesophagus . Right lung volume is unchanged with stable right lung base opacity mainly due to right lower lobe atelectasis . The left lung is clear except for small linear opacity in the left costophrenic angle , probably due to a small atelectasis . Cardiomediastinal silhouette is within normal limits . There is no pneumothorax .
    OUTPUT:
    
1 . Interval improvement of neo-esophaus distention . Persistence of contrast material collection in the distal neoesophagus indicating obstruction to antegrade passage . 2 . Stable right lung base opacity due to atelectasis is overall unchanged . Small left lung base linear atelectasis .