Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable trauma radiograph of the chest . The patient is on a trauma board , which obscures fine bony detail . The lungs are clear . The hilar and cardiomediastinal contours are normal . There is no pneumothorax or pleural effusion . Pulmonary vascularity is normal . No displaced fracture is seen .
    OUTPUT:
    
No acute cardiopulmonary process .