Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single portable upright image through the chest demonstrates low lung volumes . Basilar opacity may reflect atelectasis and post surgical change , though a focal consolidation can not be excluded . Cardiomediastinal contour , allowing for subtle change in patient positioning , is stable in appearance when compared to prior examination dated ___ . There is splaying of the trachea at its bifurcation which may reflect left artial enlargement . A stent is identified along the right side of the hemithorax presumably within the esophagus . An angulated appearance of what appear to b e two esophageal stents is noted which is unclear if this is a change in position from prior . No pneumothorax is identified . There is persistent blunting of the right costophrenic angle .
    OUTPUT:
    
Low lung volumes . Basilar opacity may reflect atelectasis and post surgical change , though a focal consolidation due to infection and / or aspiration can not be excluded . Angulated appearance of esophageal stents noted . It is unclear if this represents a change in position from prior since no prior imaging status post stent placement is available for comparison .