Inclusion Criteria:  Patients that require exposure of bony posterior spine anatomy for localization as standard of care. Clinically planned for spine surgery. Able to provide written informed consent from subject or subject's legal representative, using IRB approved consent form, and ability for subject to comply with the protocol requirements of the study.  Exclusion Criteria:  Language problems that would prevent from properly understanding instructions. Requirement of an interpreter. Patients who are excluded from consideration for the surgical procedure are therefore excluded from the research study. Special populations: pregnant women, prisoners. Minimally invasive spine surgery that does not expose the necessary bone/s. Spine surgery without posterior exposure.