Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: An endotracheal tube terminates approximately 2 .7 cm above the carina . Overall lung volumes are low . Heart size is normal . HETEROGENEOUS OPACIFICATION AT THE LUNG BASES COULD BE ATELECTASIS OR ASPIRATION . No pleural effusion or pneumothorax . THERE IS NO PNEUMOMEDIASTINUM . SLIGHT WIDENING OF THE MEDIASTINUM ABOVE THE AORTIC ARCH COULD BE NORMAL IN THE SUPINE POSITION . FOLLOWUP RADIOGRAPHY AND CLINICAL ASSESSMENT ADVISED .
    OUTPUT:
    
Endotracheal tube terminates approximately 2 .7 cm above the carina . CLINICAL AND RADIOGRAPHIC FOLLOW - UP ADVISED FOR MEDIASTINAL CONTOUR . MEDIASTINAL FLUID COLLECTION OR TRAUMA CAN BE EVALUATED WITH CHEST CT ENHANCED WITH INTRAVENOUS CONTRAST .