Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single portable supine view of the chest reveals endotracheal tube that terminates in the left mainstem bronchus and should be retracted for better positioning . The lung volumes are low which cause vascular crowding . The low lung volumes may also be contributing to the right lower lobe opacities , although aspiration is certainly a consideration as well . No pneumothorax or pleural effusion is present . Heart size is normal .
    OUTPUT:
    
1 . Left mainstem intubation . ET tube should be retracted for better positioning . 2 . Right lower lobe opacities , aspiration versus atelectasis . D / W ___ ___ at 6 :47 AM immediately upon review of the film - ___