External Radiation Therapies : EBRT : 3D CRT

Three-Dimensional Conformal Radiation Therapy (3D CRT) is a common radiation treatment therapy used to treat cancers in many parts of the body. When it first came into use, it was the best option for treating tumors that might have been considered too close to vital organs for traditional radiotherapy. IT utilizes radiation beams that are shaped to enter the patient from multiple angles in such a formation as to spare healthy tissues. The name “conformal” is derived from the technique of shaping the beams to conform to the shape of the tumor. Patients usually receive these treatments daily for durations of up to seven weeks.

Body Sites Multiple sites
Physicians All
Therapeutic Technique EBRT
Radioactive Source
  • Electrons
  • Photons
Equipment Linear Accelerator
Method of Delivery External

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  • Radioisotope Therapy (RIT)
    Radiation treatment therapies that utilize radioactive sources are called radiotherapies, or radiation therapy. These sources use high-energy radiation from x-rays, gamma rays, neutrons, protons, and other sources, to kill cancer cells and shrink tumors. Radiation damages both cancer cells and normal cells by damaging their genetic material, but normal cells are able to repair themselves and resume proper function. Because of the powerful properties of radiation, proper targeting of cancer cells is essential. Treatment therapies offered at UAB can be administered either externally or internally. External radiotherapies emit radiation from a source outside the body via a machine and include “External Beam Radiation Therapy (EBRT)” and “stereotactic radiosurgery” procedures. Internal radiotherapies place radioactive materials inside the body. They may be placed in the body near cancer cells, using “brachytherapy”, or they inject or infuse a radiolabeled substance into the body via “Radioisotope Therapy (RIT)”. Radiation therapy may be used alone or in combination with chemotherapy or surgery.
  • EBRT
    EBRT is an acronym for External Beam Radiation Therapy. It is a group of externally-administered radiation therapy treatments that deliver radiation to the patient via a linear accelerator. Radiation treatment therapies in the EBRT group include IGRT (Rapid Arc, Tomotherapy), IMRT, 3D Conformal Radiation Thearapy (3D CRT), Superficial, Total Skin Irradiation (TSI), and Total Body Irradiation (TBI).