Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views the chest were reviewed . Cardiomediastinal and hilar contours are normal . Specifically , there is no pneumomediastinum . There is no pleural effusion or pneumothorax . The lungs are well expanded and clear . Pulmonary vasculature within normal limits .
    OUTPUT:
    
No pneumomediastinum or other acute process .