Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral chest radiographs demonstrate well - expanded lungs . The cardiomediastinal contours are within normal limits . The lungs are clear . There is no pleural effusion and no pneumothorax . Bony structures are grossly intact .
    OUTPUT:
    
1 . No acute intrathoracic abnormality . 2 . No definte acute displaced rib fractures .