Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: ETT tip projects 5 .1 cm from the carina . Enteric tube traverses the diaphragm into the left upper abdomen out of the view of this image . There is lucency paralleling the left heart border . When read in conjunction with prior CT a neck which demonstrated air more superiorly in the mediastinum , this is compatible with pneumomediastinum . The heart is top - normal in size . No subdiaphragmatic free air on this supine film . Right infrahilar and lower lobe parenchymal opacities as well as the lingula opacities are more conspicuous from the prior exam . No pneumothorax or pleural effusion .
    OUTPUT:
    
1 . Pneumomediastinum . 2 . Bilateral parenchymal opacities could indicate atelectasis , infection , or contusions in the setting of any trauma .