Schematic diagram showing the method for measurement ofC3-L5.

<p><b>WVD</b> is the abbreviation of Width of vertebral body; <b>APDVD</b> is Anteroposterior diameter of vertebral body; <b>LHVD</b> is Left height of vertebral body; <b>RHVD</b> is Right height of vertebral body; <b>WVC</b> is Width of vertebral canal; <b>APDVC</b> is Anteroposterior diameter of vertebral canal; <b>WRP</b> is Width of right pedicle; <b>HRP</b> is Height of right pedicle; <b>WLP</b> is Width of left pedicle; <b>HLP</b> is Height of left pedicle.</p

Schematic diagram showing the method of measurement for C1 (Atlas).

<p><b>WD</b> is the abbreviation of Width diameter; <b>APD</b> is Anteroposterior diameter; <b>WVC</b> is Width of vertebral canal; <b>APDVC</b> is Anteroposterior diameter of vertebral canal; <b>WAT</b> is Width of anterior tubercle; <b>HAT</b> is Height of anterior tubercle; <b>WPT</b> is Width of posterior tubercle; and <b>HPT</b> is Height of posterior tubercle.</p

The parameters of L1–L5 and comparison of data from radiographic images and 3D-printed models.

<p><b>Note</b>: <b>WVD</b>: Width of vertebral body; <b>APDVD</b>: Anteroposterior diameter of vertebral body; <b>LHVD</b>: Left height of vertebral body; <b>RHVD</b>: Right height of vertebral body; <b>WVC</b>: Width of vertebral canal; <b>APDVC</b>: Anteroposterior diameter of vertebral canal; <b>WRP</b>: Width of right pedicle; <b>HRP</b>: Height of right pedicle; <b>WLP</b>: Width of left pedicle; <b>HLP</b>: Height of left pedicle.</p><p>The parameters of L1–L5 and comparison of data from radiographic images and 3D-printed models.</p

Schematic diagram showing the method of measurement for C2 (Axis).

<p><b>MAPD</b> is the abbreviation of Max anteroposterior diameter; <b>MLRD</b> is Max left-right diameter; <b>APDVD</b> is Anteroposterior diameter of vertebral body; <b>WVC</b> is Width of vertebral canal; <b>APDVC</b> is Anteroposterior diameter of vertebral canal; and <b>FHA</b> is Frontal height of axis (including the odontoid process).</p