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A Study on Treatment Target Position Verification by using Electronic Portal Imaging Device & Fractionated Stereotatic Radiotherapy  

Lee, Dong-Hoon (Tongmyong University)
Kwon, Jang-Woo (Tongmyong University)
Park, Seung-Woo (Korea Institute of Radiological & Medical Sciences)
Kim, Yoon-Jong (Korea Institute of Radiological & Medical Sciences)
Lee, Dong-Han (Korea Institute of Radiological & Medical Sciences)
Ji, Young-Hoon (Korea Institute of Radiological & Medical Sciences)
Publication Information
Journal of the Institute of Electronics Engineers of Korea SC / v.46, no.3, 2009 , pp. 44-51 More about this Journal
Abstract
It is very important to verify generated setup errors in cancer therapy by using a high energy radiation and to perform the precise radiation therapy. Specially, the verification of treatment position is very crucial in special therapies like fractionated stereotatic radiotherapy (FSRT). The FSRT uses normally high-dose, small field size for treating small intracranial lesions. To estimate the developed FSRT system, the isocenter accuracy of gantry, couch and collimator were performed and a total of inaccuracy was less than ${\pm}1mm$. Precise beam targeting is crucial when using high-dose, small field size FSRT for treating small intracranial lesions. The EPID image of the 3mm lead ball mounted on the isocenter with a 25mm collimator cone was acquired and detected to the extent of one pixel (0.76mm) after comparing the difference between the center of a 25mm collimator cone and a 3 mm ball after processing the EPID image. In this paper, the radiation treatment efficiency can be improved by performing precise radiation therapy with a developed video based EPID and FSRT at near real time
Keywords
EPID; FSRT; Radiation Therapy; Head Cancer; Therapy Beam; Treatment Efficiency;
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