Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is been interval placement of an ET tube which terminates in the right mainstem bronchus . This can be safely retracted approximately 3 cm for proper positioning in the distal trachea . There are again seen low lung volumes . The cardiomediastinal silhouettes are unchanged . There is interval increase in opacification of the left lower lobe which is likely left lower lobe collapse secondary to right mainstem bronchus intubation . Otherwise , there is no change in the lung parenchyma in comparison to prior radiograph . There is no pulmonary vascular congestion . There are no pleural effusions or pneumothoraces .
    OUTPUT:
    
ET tube which terminates in right mainstem bronchus , and requires repositioning . Secondary to this , there is new left lower lobe collapse . Otherwise unchanged chest x-ray .