Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Since chest radiographs obtained 2 weeks prior , there has been interval improvement in lingular and left lower lobe atelectasis , minimal elevation of the left hemidiaphragm , and resolution of the right pleural effusion . A small , left pleural effusion is unchanged . Median sternotomy wires are midline and intact .
    OUTPUT:
    
Unchanged , small , left pleural effusion ; improved left lower lobe atelectasis and resolution of the small , right pleural effusion .