Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Endotracheal tube tip is 4 .5 cm above carina . There is small right pleural effusion , improved since prior . Pulmonary vascularity , heart size have mildly improved . There is minimal bibasilar atelectasis , improved .
    OUTPUT:
    
Interval mild improvement . New endotracheal tube .