Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A portable frontal chest radiograph demonstrates a normal cardiomediastinal silhouette and hyperinflated lungs compatible with emphysema . No focal consolidation , pleural effusion , or pneumothorax . No displaced rib fracture is identified . The visualized upper abdomen is unremarkable .
    OUTPUT:
    
1 . No displaced rib fracture identified . If there is continued concern , dedicated rib radiographs can be obtained . 2 . Hyperinflated lungs , consistent with known emphysema .