Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single portable AP view of the chest was obtained . Endotracheal tube is seen , terminating approximately 4 cm above the level of the carina . Nasogastric tube is seen , inferior aspect not included , however , seen to at least course into the expected location of the stomach . There are relatively low lung volumes . Blunting of the left costophrenic angle may be due to a trace pleural effusion with overlying atelectasis . Minimal bibasilar opacities may relate to mild aspiration . The cardiac silhouette is top normal .
    OUTPUT:
    
Status post endotracheal tube placement , terminating approximately 4 cm above the level of the carina . Left base atelectasis , with possible small effusion . Mild bibasilar opacities could relate aspiration .