 The purpose of this research study is to determine if Stereotactic Body Radiation TherapySBRT is a good way to treat tumors near the thorax. Stereotactic Body Radiation Therapy SBRT is a general term for a group of techniques that are designed to deliver radiation therapy in a way that damages normal tissues less than conventional radiotherapy. The two features that distinguish SBRT from conventional therapy are procedures that decrease errors in patient positioning and technology that results in a radiation dose distribution that conforms more tightly to the tumor target. Patients will receive either 48 Gy or 60 Gy fractions depending on the type of tumor. The majority of patients will be treated in 1 week, Monday through Friday, with Wednesday off. 