Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Left perihilar opacities may be due to aspiration . There is no effusion or pneumothorax . The cardiomediastinal silhouette is normal . Imaged osseous structures are intact . No free air below the right hemidiaphragm is seen . Endotracheal tube tip is approximately 1 cm above the carina . Side port of the NG tube is below the GE junction .
    OUTPUT:
    
1 . Left perihilar opacities may be due to aspiration . 2 . Endotracheal tube tip is approximately 1 cm above the carina . Withdrawal by 1 - 2 cm may provide more optimal placement .