Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Supine portable AP view of the chest was provided . An NG tube is seen with its tip in the left mid abdomen . The endotracheal tube tip is seen , positioned 2 .9 cm above the carina . The lungs appear clear . No supine evidence for effusion or pneumothorax . The cardiomediastinal silhouette appears grossly unremarkable . The imaged osseous structures appear intact .
    OUTPUT:
    
Lines and tubes positioned appropriately . No acute findings in the chest .