Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Pages: 94. Chapters: BEAMnrc, Bolus (radiation therapy), Bone-seeking radioisotope, Brachytherapy, Bragg peak, British Institute of Radiology, Charged-particle radiation therapy, Chemoradiotherapy, CHHIP, Cobalt therapy, Cyberknife, D50 (radiotherapy), Dose-volume histogram, Dose profile, Dose verification system, Dosimetry, Electron therapy, External beam radiotherapy, Fast neutron therapy, Gallium 67 scan, History of radiation therapy, ICAD Inc., Image-guided radiation therapy, Indiana University Health Proton Therapy Center, Indium-111 WBC scan, Intraoperative electron radiation therapy, Intraoperative radiation therapy, Iodine-125, Isocenter, List of proton treatment centers currently operating in the United States, Margaret Cleaves, Medical physics, Megavoltage X-rays, Microwave thermotherapy, Midwest Proton Radiotherapy Institute, Mobetron, Monitor unit, Multileaf collimator, Nanoimpellers, Neutron capture therapy of cancer, Neutron generator, Orthovoltage X-rays, Oxygen enhancement ratio, Particle therapy, Pencil-beam scanning, Pencil (optics), Percentage depth dose curve, Plaque radiotherapy, Positron emission tomography, Prostate brachytherapy, Quality Assurance Review Center, Radiation-induced lung injury, Radiation burn, Radiation oncologist, Radiation proctitis, Radiation Therapy Oncology Group, Radiation treatment planning, Radioimmunotherapy, Radiopharmacology, Radiosurgery, Royal College of Radiologists, Selective internal radiation therapy, SIR-Spheres, Sirtex, Stereotactic radiation therapy, Superficial X-rays, TARGIT, TheraSphere, Tissue to Air Ratio, Tomotherapy, Unsealed source radiotherapy. Excerpt: Radiation therapy (in American English), radiation oncology, or radiotherapy (in the UK, Canada and Australia), sometimes abbreviated to XRT or DXT, is the medical use of ionizing radiation, generally as part of cancer treatment to control or kill malignant cells. Radiation therapy may be curative in a number of types of cancer if they are localized to one area of the body. It may also be used as part of adjuvant therapy, to prevent tumor recurrence after surgery to remove a primary malignant tumor (for example, early stages of breast cancer). Radiation therapy is synergistic with chemotherapy, and has been used before, during, and after chemotherapy in susceptible cancers. Radiation therapy is commonly applied to the cancerous tumor because of its ability to control cell growth. Ionizing radiation works by damaging the DNA of exposed tissue leading to cellular death. To spare normal tissues (such as skin or organs which radiation must pass through to treat the tumor), shaped radiation beams are aimed from several angles of exposure to intersect at the tumor, providing a much larger absorbed dose there than in the surrounding, healthy tissue. Besides the tumour itself, the radiation fields may also include the draining lymph nodes if they are clinically or radiologically involved with tumor, or if there is thought to be a risk of subclinical malignant spread. It is necessary to include a margin of normal tissue around the tumor to allow for uncertainties in daily set-up and internal tumor motion. These uncertainties can be caused by internal movement (for example, respiration and bladder filling) and movement of external skin marks relative to the tumor position. Radiation oncology is the medical specialty concerned with prescribing radiation, and is distinct from radiology, the use of radiation in medical imaging and diagnosis. Radiation may be prescribed by a radiation oncologist with intent to cure ("curative") or for adjuvant therapy. It may also be used as pall
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