Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP upright and lateral views of the chest were provided . The previously noted pneumomediastinum has resolved . There is no pneumothorax on the current exam . No focal consolidation , effusion , or signs of CHF . The heart and mediastinal contour is normal . No bony abnormality . Specifically , no sign of displaced rib fracture .
    OUTPUT:
    
No acute findings in the chest . Interval resolution of pneumomediastinum .