[논문]토모테라피에서 쌀 볼루스 팬텀의 유용성 평가: 팬텀연구

김대건; 정재홍

doi:10.17946/jrst.2021.44.6.663

토모테라피에서 쌀 볼루스 팬텀의 유용성 평가: 팬텀연구
Evaluating the Usefulness of Rice Bolus Phantom in Tomotherapy: Phantom Study 원문보기

방사선기술과학 = Journal of radiological science and technology, v.44 no.6, 2021년, pp.663 - 669

김대건 (순천향대학교 부천병원 방사선종양학과) , 정재홍 (순천향대학교 부천병원 방사선종양학과)

Abstract ▼ AI-Helper

The purpose of this study was to evaluate the usefulness of the rice bolus for upper-lower extremity radiation therapy by Tomotherapy. The computed tomography images were obtained for air, water, and rice bolus. The average and standard deviation of the Hounsfield unit (HU) were measured for image evaluation. The conformity index (CI) and homogeneity index (HI) were calculated for dose distribution of the planning target volume (PTV) which was treated by direct mode with gantry angle (90 and 270 angle). The point dose of a total of ten axial planes was measured to confirm the different regions. The mean of HU was -999.72 ± 0.72 at the air. The water and rice bolus were -0.13 ± 1.65 and -170 ± 27.2, respectively. The CI (HI) of PTV was 0.96 (1.36) at the air. 0.95 (1.04) at the water bolus, and 0.95 (1.04) at the rice bolus. The maximum dose for air was 136 cGy which is about 32% higher than 103 cGy for water and 104 cGy for rice bolus. There was a statistical difference for point dose between air and water including rice bolus (p=0.04), however, no statistical difference between water and rice bolus (p=0.579).The rice bolus phantom for extremities radiation therapy could be not only the optimized dose distribution but also the convenience and equipment safety at Tomotherapy. However, additional research will be necessary to more accurately verify the clinical usefulness of rice bolus phantom due to not enough examination.

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토모테라피에서 쌀 볼루스 팬텀의 유용성 평가: 팬텀연구
Evaluating the Usefulness of Rice Bolus Phantom in Tomotherapy: Phantom Study 원문보기

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토모테라피에서 쌀 볼루스 팬텀의 유용성 평가: 팬텀연구 Evaluating the Usefulness of Rice Bolus Phantom in Tomotherapy: Phantom Study 원문보기

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토모테라피에서 쌀 볼루스 팬텀의 유용성 평가: 팬텀연구
Evaluating the Usefulness of Rice Bolus Phantom in Tomotherapy: Phantom Study 원문보기