Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP and lateral views the chest were viewed . The cardiomediastinal and hilar contours are stable . There is no pleural effusion or pneumothorax . The lungs are well expanded without focal consolidations . The previously noted nodular opacity at the right lung base is not clearly seen on the current study . Interstitial markings are again prominent , likely indicative of chronic lung disease . No displaced rib fractures are seen .
    OUTPUT:
    
No pneumothorax or displaced rib fractures .