Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is minimal increased subsegmental atelectasis at the left lung base . Otherwise , there has been no additional interval change from the previous exam . Cardiac and mediastinal contours are unchanged . Elevation of the left hemidiaphragm is again noted . No large pneumothorax or pleural effusion is identified . There are no acute osseous abnormalities .
    OUTPUT:
    
Mildly increased subsegmental atelectasis in the left lung base . Otherwise , no significant interval change .