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The effect of patient position on dose in radiation therapy of liver cancer  

Jung, Won Seok (Department of Radiation Oncology, Kyunghee College Hospital)
Kim, Ju Ho (Department of Radiation Oncology, Yonsei Cancer Center)
Kim, Young Jae (Department of Radiological Technology, Daegu Health College)
Shin, Ryung Mi (Department of Radiation Oncology, Kyunghee College Hospital)
Oh, Jeong Hun (Department of Radiation Oncology, Kyunghee College Hospital)
Jeong, Geon A (Department of Radiation Oncology, Kyunghee College Hospital)
Jo, Jun Young (Department of Radiation Oncology, Kyunghee College Hospital)
Kim, Gi Chul (Department of Radiation Oncology, Kyunghee College Hospital)
Choi, Tae Kyu (Department of Radiation Oncology, Kyunghee College Hospital)
Publication Information
The Journal of Korean Society for Radiation Therapy / v.26, no.1, 2014 , pp. 1-9 More about this Journal
Abstract
Purpose : To analyze tumor's movement and volume change from changing position in order to minimize movement caused by breathing. Materials and Methods : We conducted survey of 14 patients with HCC(Hepatocellular carcinoma). Patient immobilization device was made in two ways(Supine position, prone position) and from image acquisition, tumor's movement, volume and dose are analyzed. Results : The mean movement of target(LR, Left-right) in supine position and prone position was $2.76{\pm}1.25mm$, $2.21{\pm}0.93mm$. AP(Anterior-posterior) and SI(Superior-inferior) was $4.02{\pm}1.63mm$, $11.56{\pm}3.08mm$, $3.36{\pm}1.17mm$, $7.45{\pm}1.96mm$. Treatment volume was decreased and normal liver volume was increased in prone position. Conclusion : We could reduce the margin of the treatment volume by minimizing the movement of liver caused by breathing. Especially in prone position, it is considered to be able to decrease the movement of the liver and increase normal liver volume.
Keywords
Supine position; Prone position; Tumor volume;
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