Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are markedly low . Endotracheal tube is in standard position terminating approximately 4 cm from the carina . Enteric tube tip and side port are within the stomach . A right internal jugular central venous catheter tip lies within the right atrium similar to that seen the previous study . Heart size is accentuated due to low lung volumes , appearing mildly enlarged . Similarly , the superior mediastinum appears widened due to supine AP positioning and low lung volumes . Crowding of bronchovascular structures is present with possible mild pulmonary vascular congestion . Patchy opacities in lung bases may reflect atelectasis , however aspiration can not be excluded . There is no large pleural effusion or pneumothorax .
    OUTPUT:
    
1 . Markedly low lung volumes with probable bibasilar atelectasis . Aspiration at the lung bases can not be completely excluded . 2 . Standard positioning of endotracheal and enteric tubes .