A Study to Quantify Tumour Perfusion for Spine Metastasis Treated With Stereotactic Body Radiotherapy (SBRT)

Inclusion Criteria: * Age ≥21 years of age * Proven metastatic disease, excluding haematological and germ cell neoplasms * Life expectancy \>3 months, Eastern Cooperative Oncology group (ECOG) 0-2 Exclusion Criteria: * The patient must not have an allergy to gadolinium contrast that will limit the ability to image the tumour by MRI safely even with the use of premedication * eGFR \< 30 mL/min or if patient is suffering from acute renal insufficiency * Prior radiotherapy to the specified region * Recent surgery to affected spinal levels, or patients requiring immediate surgical intervention * Spinal instability score (SINS) \>12 * Symptomatic cord compression (Bilksy grade 2 or 3), or worsening neurological deficits * Body weight of more than 120kg * Pregnancy