Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single frontal view of the chest demonstrates ET tube with tip projecting 3 .5 cm above the carina . An enteric tube traverses below the diaphragm inferiorly out of view . Low lung volumes are unchanged . The heart size is top normal , with minimal unfolding in the thoracic aorta and arch calcifications . The lungs are clear with the exception of trace subsegmental atelectasis in the left base . Previously seen periaortic lucency one day prior persists , which remains concerning for pneumomediastinum and / or pneumopericardium . There is no pneumothorax , pulmonary edema , or large right effusion .
    OUTPUT:
    
Persistent periaortic lucencies raising concern for pneumomediastinum and / or pneumopericardium . As suggested before , a CT is recommended for further assessment in the absence of known cause . Findings discussed with Dr . ___ ___ phone at 11 :37 a .m . on ___ by Dr . ___ .