Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A frontal supine view of the chest was obtained portably . The endotracheal tube ends 6 .5 cm above the carina . A left subclavian line ends in the SVC . A nasogastric tube follows the expected course although the tip is not visualized . Chest tube overlies the left hemithorax . Lung volumes are lower than on the prior study . Right middle lobe and right basilar atelectasis are similar to prior . Left basilar opacity is likely atelectasis but supervening infection can not be excluded . Small bilateral pleural effusions and rib fracture are better appreciated on CT .
    OUTPUT:
    
No change from ___ . Left basilar opacity is likely atelectasis , but supervening infection can not be excluded .