Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal AP and lateral views of the chest were obtained . Low lung volumes result in bronchovascular crowding . There is mild left basilar atelectasis . No focal consolidation , pleural effusion , or pneumothorax . Heart size is within normal limits allowing for technique and lung volumes . Mediastinal silhouette and hilar contours are normal . No displaced rib fracture is seen . Lumbar spine hardware is incompletely evaluated .
    OUTPUT:
    
No evidence of acute intrathoracic injury .