Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The patient has been extubated . Dobbhoff tube still curves in the stomach . Minimal cardiac congestion is unchanged . Small new left lung base opacity is nonspecific , could either be small pleural effusion or atelectasis , but superimposed infection or aspiration can not be excluded . Known hiatal hernia .
    OUTPUT:
    
1 . Unchanged mild cardiac congestion . 2 . New very small opacification of the left lung base is nonspecific , could reflect atelectasis and small pleural effusion . Aspiration or infection can not be excluded in appropriate clinical setting .