Stereotactic Body Radiation Therapy Stereotactic body radiation therapy (SBRT) is the delivery of high precision, biologically potent doses of radiation to tumors of the chest, abdomen, and pelvis. Implementing elements of 3D-CRT with stereotactic targeting, SBRT permits delivery of 3-4 high dose fractions totaling 48-60 Gy with good local control and low toxicity.