Do you use a comprehensive volumetric, rather than numeric, cutoff in consideration of SRS vs WBRT for brain metastases?

I think there is quite a bit to unpack from this question.

First, I would contend that there is a whole world between SRS & WBRT. There are even active multi-institutional randomized studies being performed to better define this world. Many institutions, including mine, have largely shifted away fro...