Navigation Image Accuracy Test in Cervical Spine Surgery Using Anatase Spine Surgery Navigation System

Inclusion Criteria: * Age ≥18 years and ≤70 years * Patients who need to undergo posterior cervical pedicle screw placement surgery * The subject is willing to provide preoperative CT images and to use the navigation system during surgery for the verification of navigation image accuracy. * Subjects are willing and able to comply with the procedures and requirements of this clinical trial. * Subjects are able to understand and willing to sign the informed consent form. Exclusion Criteria: * Creutzfeldt-Jakob disease * Known allergy to stainless steel * Immunocompromised such as but not limited to Acquired Immunodeficiency Syndrome (AIDS), HIV infection, Severe Combined Immunodeficiency Syndrome, Thymic Hypoplasia * Pregnant women * Have a systematic or local infection, which may increase study risk * Hereditary or acquired hemorrhagic diathesis or coagulation factor deficiency * Use of anticoagulants * Osteoporosis * Be on uncontrolled diabetes mellitus. * Immunologically suppressed, or has received systemic steroids, excluding nasal steroids, at any dose daily for \> 1 month within last 12 months. * Previous history of cervical spine surgery * Other medical conditions, as judged by a physician, may affect the physiological status for surgery.