Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There has been interval removal of endotracheal tube . Heart size is normal . There is calcification of the aortic arch . The mediastinal and hilar contours are normal . The pulmonary vasculature is normal . Again , there is opacity at the right base which is likely atelectasis . No pleural effusion or pneumothorax is seen .
    OUTPUT:
    
Persistent right basilar opacity which is likely atelectasis .