Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Status post extubation and orogastric tube has been removed . Ill - defined opacity at the left lung base obscuring the diaphragm margin is new since ___ and is concerning for aspiration . Pleural effusion if any is very minimal on the left side . Otherwise , there are no interval changes in the lungs . Heart size , mediastinal and hilar contours are normal . There is no pneumothorax .
    OUTPUT:
    
Left lung base opacity new since ___ , is concerning for aspiration . Presumed small left pleural effusion .