Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is bibasilar atelectasis as well as a subtle right lower lobe opacity . No pleural effusion or pneumothorax . Heart size , mediastinal contour , and hila are unremarkable . Visualized osseous structures are unremarkable . No displaced rib fractures . An endotracheal tube is in appropriate position 5 cm above the level of the carina .
    OUTPUT:
    
1 . Right lower lobe opacity is worrisome for pulmonary contusion , pneumonia or aspiration in the appropriate clinical setting . 2 . Endotracheal tube in appropriate position .