Stereotactic Body Radiation Therapy

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Radiation therapy is an important component for treatment of cancer because it inhibits the multiplication potential of cancerous cells. Early detection of cancers that is treated using methods including radiation therapy have become curable. Radiation therapy makes up about 40% of the curable treatment for cancer.
Radiation therapy kills cancer cells or causes genetic changes in the cells that causes cancer cell death by forming ions and depositing energy in the cells of tissues that these ions pass through. High-energy radiation damages DNA and prevents the cell from replicating further. Although radiation therapy aims to target cancerous tissues, the radiation also affects surrounding healthy tissues. However, radiation remains effective because normal tissues are able to heal faster than cancerous tissues. …show more content…
Fractionation currently uses different amounts of doses of radiation over a certain period of time depending on the type of cancer being treated. New advances include 3D Conformal radiotherapy (3DCRT), Intensity Modulated Radiation Therapy (IMRT), Image-guided Radiotherapy (IGRT), and Stereotactic Body Radiation Therapy (SBRT). 3DCRT, replaced by 2D radiation therapy, enables us to accurately localize the tumor(s) and important organs for better placement in beams. Using computers, IMRT creates radiation doses that conform to the shape of the tumor and better avoid vital organs in the body. IGRT uses pre-radiotherapy imaging to detect errors in the suspected position of the tumor in relation to a vital organ. As a result of these technological advances, SBRT is able to use high doses of radiation in fewer treatment fractions, as it is able to precisely target small tumors anywhere in the
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