Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lung volumes are extremely low , which cause accentuation of the mediastinum and crowding of the bronchovascular structures . Within this limitation , the heart is likely mildly enlarged . The endotracheal tube ends 2 cm above the carina . An orogastric tube ends in the stomach . Overlying clips from the patient 's bra and EKG clips are noted . A square radioopaque device obscure assessment of the medial right lung base . Bilateral lower lobe opacities most likely represent atelectasis ; however , infection can not be excluded .
    OUTPUT:
    
Limited study due to extremely low lung volumes and radiopaque device projecting over the medial right lung base . The ET tube ends 2 cm above the carina and should be slightly withdrawn . Mild cardiomegaly . Bilateral lower lobe opacities most likely represent atelectasis ; however , infection or aspiration can not be excluded .