Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: In comparison to the prior radiograph performed less than 1 hr ago , there has been no significant interval change in positioning of the nasogastric tube , which terminates in the distal stomach / proximal duodenum . Bronchovascular markings are slightly accentuated by low lung volumes . Bibasilar opacities most likely represent atelectasis , although infection could be considered in the appropriate clinical setting . No substantial pleural effusion or pneumothorax . Cardiomediastinal silhouette is within normal limits .
    OUTPUT:
    
No significant change in position of the nasogastric tube , which terminates in the distal stomach / proximal duodenum .