Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Inspiratory volumes are low . The heart is not enlarged . No CHF , focal infiltrate , effusion , or pneumothorax is detected . No radiopaque tracheal stent is identified . The tracheal air column is grossly unchanged . Surrounding mediastinal soft tissues are within normal limits . No pneumothorax detected . No obvious pneumomediastinum identified
    OUTPUT:
    
No acute pulmonary process identified . Please note that no radiopaque structure is identified over the tracheal air column .