Fig. 2
Schematic diagram of the CT images. (a, b) At the sagittal position, the white line represents the established plane during the measurement process. ANU: the anteroposterior distance from the LPER to the anterior margin of the cervical nerve at the position of the uncinate process tip. VNU: the vertical distance from the LPER to the inferior margin of the cervical nerve at the position of the uncinate process tip. VNI: the vertical distance from the LPER to the cervical nerve inferior margin origin. VNS: the vertical distance from the LPER to the cervical nerve superior margin origin. (c, d) At the transverse position, the white line is the established plane during the measurement process. DLB: the left-right distance from the LPER to the dura mater lateral border. PLB: the anteroposterior distance from the LPER to the vertebral pedicle isthmus lateral border.
