Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral chest radiographs demonstrate a normal cardiomediastinal silhouette . Lung volumes are low , with bronchovascular crowding and mild bibasilar atelectasis . A trace right pleural effusion is unchanged . No left pleural effusion or pneumothorax is identified . No rib fracture is seen . The visualized upper abdomen is unremarkable .
    OUTPUT:
    
Unchanged trace right pleural effusion . Otherwise normal chest radiograph , without acute fracture .