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간암환자에서 Electronic Portal Imaging Device(EPID)를 이용한 자세 오차 및 종양 이동 거리의 객관적 측정

Other Titles
 Measurements of Setup Error and Physiological Movement of Liver by Using Electronic Portal imaging Device in Patients with Hepatocellular Carcinoma 
 금기창  ;  이상욱  ;  신현수  ;  김귀언  ;  성진실  ;  이창걸  ;  추성실  ;  장세경  ;  서창옥 
 Journal of the Korean Society for Therapeutic Radiology and Oncology, Vol.18(2) : 107-113, 2000 
Journal Title
Journal of the Korean Society for Therapeutic Radiology and Oncology(대한방사선종양학회지)
Issue Date
EPID ; Hepatoma ; Radiation treatment ; Setup error
Purpose : The goal of this study was to improve th accuracy of three-dimensional conformal radiotherapy (3-D CRT) by measuring the treatment setup error and physiological movement of liver based on the analysis of images which were obtained by electronic portal imaging device (EPID). Materials and Methods : For 10 patients with hepatocellular carcinoma, 4-7 portal images were obtained by using EPID during the radiotherapy from each patient daily. We analyzed the setup error and physiological movement of liver based on the verification data. We also determined the safely margin of the tumor in 3-D CRT through the analysis of physiological movement. Results : The setup errors were measured as 3 mm with standard deviation 1.70 mm in x direction and 3.7 mm with standard deviation 1.88 mm in y direction respectively. Hence, deviation were smaller than 5 mm from the center of each axis. The measured range of liver movement due to the physiological motion was 8.63 mm on the average. Considering the motion of liver and setup error, the safety margin of tumor was at least 15 mm. Conclusion : EPID is a very useful device for the determination of the optimal margin of the tumor, and thus enhance the accuracy and stability of the 3-D CRT in patients with hepatocellular carcinoma.
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Appears in Collections:
1. College of Medicine (의과대학) > Dept. of Radiation Oncology (방사선종양학교실) > 1. Journal Papers
Yonsei Authors
Seong, Jin Sil(성진실) ORCID logo https://orcid.org/0000-0003-1794-5951
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