Studying a New Piece of Equipment That Can Help Plan Radiation Therapy of the Spine

Inclusion Criteria: * \>/= 18 years of age at the time of treatment * Able to give informed consent * Consented for spine stereotactic radiation therapy * No contraindications for CT myelograms which include: * Allergy to CT contrast * Use of phenothiazines * Platelet count \< 60,000 K/mcl * INR \> 1.5 * VEGF inhibitor use in the past 2 weeks prior to myelogram * NSAID use in the past 5 days prior to myelogram * Renal disease * Creatinine \> 1.2 mg/dL * No contraindications for MRI scans which include: * Newly placed glucose monitors * Tattoos (Tattoos for radiation therapy are allowed) * Presence of a cardiac pacemaker * Presence of an implanted cardioverter defibrillator * Breast tissue expander * Aneurysm clip * Any other implanted metallic (BB, bullet, shrapnel, IUD, metallic stent or filter, spinal cord simulator etc.) or electronic device which is considered MR unsafe * Severe claustrophobia or inability to lie flat for the duration of the study, etc. Exclusion Criteria: * Presence of surgical spine hardware at the region of interest * Presence of cervical spine lesions * History of claustrophobia