Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP and lateral upright radiographs through the chest demonstrate no focal opacity convincing for pneumonia . Cardiomediastinal and hilar contours are within normal limits . There is no pleural effusion or pneumothorax . Osseous structures demonstrate no acute abnormality .
    OUTPUT:
    
No focal opacity convincing for pneumonia . If clinically focal findings are present to suggest chest cage abnormality , dedicated rib films could be obtained for further evaluation as conventional radiographs are insensitive for chest cage trauma .