Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: ET tube is seen at the level of the proximal right mainstem bronchus and should be pulled back . With the limitation of supine film with rotation , the lungs are grossly clear . There is presumed elevation of the left hemidiaphragm potentially due to eventration . The cardiomediastinal silhouette is within normal limits . Surgical clips project over the right hemi thorax . Degenerative changes noted at the shoulders .
    OUTPUT:
    
ET tube in the upper right mainstem bronchus and should be pulled back .