Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest were obtained . Low lung volumes . Lungs appear clear bilaterally without focal consolidation , effusion , or pneumothorax . Cardiomediastinal silhouette appears normal and stable . No displaced rib fractures are seen . Thoracic spine appears to align normally .
    OUTPUT:
    
No pneumothorax or definite sign of fracture . If strong clinical concern for rib fracture , a rib series may be obtained .