Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest were obtained demonstrating clear well expanded lungs without focal consolidation , effusion , or signs of pneumothorax . Cardiomediastinal silhouette is normal . Bony structures appear intact . No definite displaced rib fracture is seen . Thoracic spine appears grossly intact , though degenerative changes are noted in the upper lumbar spine on the lateral view .
    OUTPUT:
    
No pneumothorax or other acute injury seen .