What is your planning approach for SBRT when the tumor abuts the great vessels such as aortic arch or SVC?  

I think there are several reasonable approaches here. The first part is whether this is curative intent (early stage) vs non-curative but for local control (i.e. oligometastastic/oligoprogression). I lean towards being more aggressive in the curative intent setting while trying to be a little more c...

I agree with @Dr. Bradley above. 10Gy x 5, but am not running the center of the lesion much hotter, instead keeping the whole ptv and gtv less than 105% or so.