Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The study is limited by exceedingly low lung volumes . There are opacities seen in the left lobe lower lobe . There is no pleural effusion or pneumothorax . Cardiac and mediastinal contours are unchanged . Cholecystectomy clips and cervical fusion hardware are noted .
    OUTPUT:
    
Low lung volumes limit full evaluation . The opacities seen within the left lower lobe are likely atelectasis , although , pneumonia is not excluded .