Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Evaluation is somewhat limited by low lung volumes . However , minimal bibasilar atelectasis is similar in appearance to ___ . There are no new focal consolidations or pleural effusions . There is no pneumothorax . The heart and mediastinum are within normal limits .
    OUTPUT:
    
Low lung volumes . Minimal bibasilar subsegmental atelectasis with otherwise clear lungs .