Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Since the prior radiograph performed earlier this morning , the endotracheal tube has been advanced and now terminates at the proximal right mainstem bronchus . There is now complete opacification of the left hemithorax . This appears slightly worse compared to the prior radiograph from this morning due to loss of the minimal left lung aeration that was present on the prior CXR . Right lung is essentially clear , with no pneumothorax or pleural effusion . Cardiac silhouette is obscured . Enteric tube terminates in the stomach . Fiducial marker adjacent to the left mainstem bronchus is re-demonstrated .
    OUTPUT:
    
1 . The endotracheal tube has been advanced and now terminates at the proximal right mainstem bronchus . 2 . Complete opacification of left hemithorax due to large pleural effusion and collapse .