How do you treat non-spine bone oligometastases?  

If a patient has a single oligometastatic bone lesion of the pelvis from a lung adenocarcinoma, what is your preferred dose/fractionation scheme for SBRT?

Do you rely on MRI to delineate the osseous lesion, or is CT or PET/CT imaging sufficient?

What margins do you typically employ, and where do you derive dose constraints from?