Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal portable upright radiograph of the chest demonstrate normal heart size . The mediastinal silhouette and hilar contours are normal . The lungs are clear . No pleural effusion or pneumothorax .
    OUTPUT:
    
No pneumonia . Per OMR note , patient with known steak impaction in esophagus ; however , if needed to evaluate for foreign body by xray , a lateral view of the neck and chest could be obtained .