Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is a faint tubular density approximately 2 .6 cm in length , projecting over the expected course of the right mainstem bronchus . This would be compatible with a right mainstem bronchus stent , best correlated with details of the procedure . Again seen is patchy opacity of both lung bases , slightly increased at the base of the right cardiophrenic region . No pneumothorax is detected . The cardiomediastinal silhouette is unchanged allowing for technical differences . Again seen is linear density projecting over the right heart silhouette , of uncertain etiology or significance --? Vascular calcification , surgical material , or residual oral contrast , for example , in the neo esophagus . No new focal infiltrate is identified . Minimal blunting of the right costophrenic angle is unchanged . Oral contrast again noted in the bowel .
    OUTPUT:
    
1 . Stent visualized over right mainstem bronchus . No pneumothorax or pneumomediastinum detected . 2 . Bibasilar patchy opacities , possibly minimally worst in the right cardiophrenic region .