Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Trace pneumopericardium is present . Faint lucencies persist in the region of the gastroesophageal junction , likely representing residual pneumomediastinum , and better appreciated on prior CT . There is persistent blunting of the right costophrenic angle , corresponding to focal atelectasis on CT . Left lung is clear . Hilar contours are normal .
    OUTPUT:
    
1 . Trace residual pneumomediastinum and pneumopericardium . 2 . Right lower lobe atelectasis .