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Evaluation of the efficiency of the Vac-lock type belly board in Pelvic cancer Radiation Treatment  

Kim, YoungYeun (Department of Radiation Oncology, Samsung Medical Center)
Bang, Seungjae (Department of Radiation Oncology, Samsung Medical Center)
Jung, Ilsun (Department of Radiation Oncology, Samsung Medical Center)
Kim, Jungsu (Department of Radiation Oncology, Samsung Medical Center)
Kim, YoungKon (Department of Radiation Oncology, Samsung Medical Center)
Publication Information
The Journal of Korean Society for Radiation Therapy / v.26, no.1, 2014 , pp. 37-42 More about this Journal
Abstract
Purpose : At the time of the pelvis cancer radiation treatment using the belly board, set-up error is large because of a prone position. In order to improve the reproducibility, we made Vac-lock type belly board. In this study, we attempt to validate its utility. Materials and Methods : We compared belly board and Vac-lock type belly board through the OBI. OBI was performed three times with entire course of treatment and the setup errors in the direction of X axis, Y axis, Z axis were recorded and calculated the distance from the isocenter. Results : X axis, Y axis, Z axis setup errors with existing belly board were 0.32 cm, 0.41 cm, 0.29 cm. The setup errors with the vac-lock type belly board were 0.12 cm, 0.19 cm, 0.17 cm. Further, errors of 0~0.29 cm were increased from 48% to 83% when using VLT belly board. Error of 0.5 cm or more was reduced from 21% to 2%. Conclusion : Vac-lock type belly board is able to maintain the efficacy of existing and create to match the characteristics of the patient. Therefore We think that vac-lock type belly board is very useful in pelvic cancer patients.
Keywords
Vac-lock type belly board; On Board Imager; Reproducibility;
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