Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Compared with the prior radiograph , no significant changes . The left subclavian line has been removed . Endotracheal tube is unchanged in position . No evidence of pneumothorax . Bilateral perihilar and bibasilar opacifications may be due to worsening pulmonary vascular congestion and edema , but superimposed bilateral aspiration must also be considered .
    OUTPUT:
    
Bilateral perihilar and basilar opacifications may be due to worsening pulmonary edema , but superimposed aspiration must also be considered .