1)age 18 and older at time of registration. 2) recursive partitioning class (RPA) I or II. 3) 1 to 3 newly diagnosed brain metastases 4) must be eligible to have all lesions treated by SRS as determined by the radiation oncologist on the basis of location and size. 5)MRI with contrast must be performed with 1 month of registration. 6)Signed informed consent form approved by the IRB agreeing to randomization .