Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiac , mediastinal , and hilar contours are unremarkable . There are low lung volumes . Minimal streaky opacities in the lung bases likely reflect atelectatic changes . No focal consolidation , pleural effusion , or pneumothorax is present . There are no acute osseous abnormalities .
    OUTPUT:
    
Low lung volumes with probable mild atelectasis at the lung bases .