At 6 weeks post SBRT-the patient will come back to the radiation oncology clinic for a history and physical, zubrod, and weight. The patient also have pulmonary function testing (PFT), adverse event reporting, 6 minute walk test and pulmonary rehab per plan developed pre-treatment, hospitalization and smoking assessment #1 Research 4DCT, not diagnostic, will be obtained at this visit and done in the radiation oncology department.