Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Numerous skin ___ overlie the mediastinum . An endotracheal tube terminates 6 .5 cm above the carina . Again seen is an opacity spanning the left lung , compatible with moderate - to - severe atelectasis . The lungs are relatively hypoinflated . No large effusion is detected .
    OUTPUT:
    
Moderate - to - severe left atelectasis . The overall examination is minimally changed since 3 : 48 a .m .