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/Home//Brain Tumors: Radiation Therapy
Radiation Therapy
Radiation therapy uses high-energy x-rays to kill cancer cells and abnormal brain cells and shrink tumors. Radiation therapy may be an option if the tumor cannot be treated effectively through surgery.
Standard External Beam Radiotherapy uses a variety of radiation beams to create a conformal coverage of the tumor while limiting the dose to surrounding normal structures. The risk of long-term radiation injury with modern delivery methods is very low. Newer techniques of delivery aside from 3-dimensional conformal radiotherapy (3DCRT) include intensity-modulated radiotherapy (IMRT).
Proton Beam Treatment employs a specific type of radiation in which protons, a form of radioactivity, are directed specifically to the tumor. The advantage is that less tissue surrounding the tumor incurs damage.
Stereotactic Radiosurgery (like Gamma Knife, Novalis and Cyberknife) is a technique that focuses the radiation with many different beams on the target tissue. This treatment tends to incur less damage to tissues adjacent to the tumor. Currently, there is no data to suggest one delivery system is superior to another in terms of clinical outcome, and each has its advantages and disadvantages.
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