Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Supine portable AP view of the chest was provided . Underlying trauma board in place limits evaluation . The endotracheal tube is positioned approximately 2 .1 cm above the carina . The lungs appear clear bilaterally without definite signs of focal consolidation or supine evidence for effusion or pneumothorax . The cardiomediastinal silhouette appears normal . The imaged osseous structures appear intact .
    OUTPUT:
    
No acute findings . Please refer to subsequent CT for further details .