Stereotactic Body Radiation Therapy (SBRT) is a special type of radiation therapy that precisely focuses a high-dose beam of radiation, through the use of a treatment-planning computer system, to an area of the body. One or several stereotactic radiation treatments are generally delivered within the body, excluding the brain or spine, without damaging healthy tissue nearby. SBRT is best for very small early-stage tumors of the lung or isolated tumors from various types of cancer. Treatments are usually given once a day for about a week, although this can vary depending on the type of tumor or condition of the patient. The advantage of SBRT is it delivers the higher dose of radiation to a tumor in fewer number of treatments than traditional treatments. Additionally since it is very precise there is little effect on nearby organs.