The location of the soft palate in the view of endoscopic trans-nasal surgery to clivus region.

DH: Distance between the nostril and the anterior part of the soft palate in sagittal middle plane.RH: The angle between horizontal direction of soft palate and the direction of the soft palate in mid-sagittal line.DH1: Distance between the nostril and the initial point of the soft palate in the position 10 mm right to the mid-sagittal plane.RH1: The angle between horizontal direction of soft palate and the direction of the soft palate in the position 10 mm right to the mid-sagittal plane.DT: Vertical distance between the inferior turbinate and soft palate in the coronal plane through the anterior part of the soft palate.DT1: Vertical distance between the inferior turbinate and soft palate in the coronal plane through the posterior part of the inferior turbinate.The location of the soft palate in the view of endoscopic trans-nasal surgery to clivus region.