Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single frontal view of the chest demonstrates an ET tube with tip extending to 6 cm above the carina . Prominent cardiac silhouette is likely accentuated by AP technique . Dense retrocardiac opacity is redemonstrated , but somewhat less pronounced as compared to one day prior , which may reflect slight improvement in dependent atelectasis . The upper lungs remain lucent , consistent with moderate - to - severe emphysema correlated with prior CT . There is no pneumothorax . There is no right pleural effusion . A small left pleural effusion is present .
    OUTPUT:
    
Mild interval improvement of left basilar atelectasis .