Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral radiographs of the chest demonstrate well expanded clear lungs . The cardiomediastinal and hilar contours are unchanged . There is no pneumothorax , consolidation , or pleural effusion . A left - sided pacemaker is seen with the leads in the appropriate position . There is minimal irregularity of the posterior eighth right rib . There are no acute displaced rib fractures
    OUTPUT:
    
No acute displaced rib fractures . Minimal irregularity of the posterior eighth right rib , maybe related to prior trauma .