Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: An endotracheal tube terminates approximately 4 .7 cm above the carina , in grossly appropriate location . An enteric tube courses inferiorly below the lower aspect of the film . The cardiomediastinal contours are within normal limits . ASIDE FROM HETEROGENEOUS OPACIFICATION AT THE LEFT LUNG BASE , PROBABLY ATELECTASIS , ALTERNATIVELY ASPIRATION , THE lungs are clear without focal consolidation . The bilateral hila are unremarkable . There is no pneumothorax or pleural effusion . There is no pulmonary vascular congestion .
    OUTPUT:
    
ET tube in appropriate location . LEFT LOWER LOBE ATELECTASIS OR ASPIRATION SHOULD BE FOLLOWED RADIOGRAPHICALLY .