Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal portable chest radiograph demonstrates no intraperitoneal free air . The lungs are clear . There is no pleural effusion or pneumothorax . The heart size is normal , the mediastinal contours are normal . The pulmonary vasculature is normal in appearance .
    OUTPUT:
    
No intraperitoneal free air , or acute chest pathology .