Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Endotracheal tube terminates approximately 8 .7 cm above the carina with the patient 's head up , previously 7 .5 cm , and should be advanced by 3 - 4 cm for optimal placement . Enteric tube is in the stomach . Left chest tube directed towards the apex is unchanged . Cardiomediastinal silhouette is stable . The left lung is better aerated ; however , diffuse heterogeneous opacities in the left lung are relatively unchanged . The right lung is clear . There is no pleural effusion or pneumothorax . Multiple fractures are better demonstrated on a subsequent CT from the same day .
    OUTPUT:
    
1 . Improved aeration of the left lung with persistent heterogeneous opacities , possibly representing contusion in the setting of trauma . 2 . Endotracheal tube is too high and should be advanced by no more than 4 cm .