Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The endotracheal tube is appropriately positioned , ending 3 .5 cm above the level of the carina . A new enteric catheter courses below the level of the diaphragm and out of the field of view inferiorly . There has been marked improvement in aeration of the left mid - to - lower lung , status post bronchoscopy with presumed removal of a mucous plug . Moderate left lower lung / retrocardiac atelectasis persists . Concomitant infection or re-expansion edema in this region is not excluded . A small left pleural effusion may be present . There may also be a tiny right pleural effusion , not significantly changed . There is no pneumothorax . The heart size is normal . The mediastinal contours are normal .
    OUTPUT:
    
1 . Marked interval improvement in aeration of the left mid - to - lower lung with moderate residual volume loss at the left lung base . Given the persistent left lower lung opacities , infection or re-expansion edema in this region is not excluded . 2 . Possible small left and tiny right pleural effusions .