Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral radiographs of the chest were obtained . Spinal fusion hardware is incompletely visualized at the superior aspects of the image . Lung volumes are somewhat low , with bibasilar atelectasis . The heart size and mediastinal contours are normal . No focal consolidation , pleural effusion or pneumothorax is present . The visualized osseous structures are grossly unremarkable .
    OUTPUT:
    
No evidence of mediastinal widening .