Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lung volumes are low . Allowing for that , the cardiac , mediastinal and hilar contours are probably within normal limits . There is no pleural effusion or pneumothorax . Patchy opacities in the lower lungs are probably due to minor atelectasis . There is no free air .
    OUTPUT:
    
Suspected minor atelectasis at the lung bases with low lung volumes . No free air identified .