What is your protocol for type of surveillance imaging (CT/MRI/PET) and frequency of follow-up after SBRT to a bone metastasis?

I typically have approached decisions regarding surveillance based on the site (i.e., spinal vs. non-spinal bone metastasis), indication for SBRT (i.e., definitive or post-operative, particularly in spinal metastasis patients who required initial debulking), and primary site (i.e., radiosensitive, s...

Assuming the patient has had a palliative response and is without pain, follow-up surveillance studies are not recommended, and I do not routinely schedule follow-up radiographic studies to assess bone metastasis response.