Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP portable semi upright view of the chest . The endotracheal tube is unchanged in position with its tip approximately 5 .3 cm above the carinal . The orogastric tube tip remains in place in the left upper quadrant . Mild bibasilar opacities likely reflect atelectasis though difficult to exclude a component of aspiration . Otherwise unremarkable .
    OUTPUT:
    
Subtle opacities in the lower lungs likely atelectasis , difficult to exclude aspiration . Overall no change .