Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single supine view of the chest is compared to previous exam from ___ . Endotracheal tube is seen with tip 4 cm from the carina . NG tube seen with tip in the gastric body , side port past the GE junction . Lower lung volumes are seen on the current exam and there is secondary crowding of the bronchovascular markings . More confluent bibasilar opacities are seen projecting in the retrocardiac region . Cardiomediastinal silhouette is within normal limits . Osseous and soft tissue structures are unremarkable .
    OUTPUT:
    
ET and NG tubes as above . Bibasilar opacities , potentially due to atelectasis ; however , aspiration or infiltrate are also possible .