JACoW is a publisher in Geneva, Switzerland that publishes the proceedings of accelerator conferences held around the world by an international collaboration of editors.
TY - CONF AU - Wang, Y. AU - Gong, Y.H. AU - Liu, J.C. AU - Sui, L. AU - Wang, Q.J. ED - Zhang, Tianjue ED - Schaa, Volker R.W. ED - An, Shizhong ED - Kiselev, Daniela ED - Liu, Yuntao ED - Li, Pengzhan TI - A Comparison Study of the Designing Models of Range Modulator by Using FLUKA Simulation Codes J2 - Proc. of CYCLOTRONS2022, Beijing, China, 05-09 December 2022 CY - Beijing, China T2 - International Conference on Cyclotrons and their Applications T3 - 23 LA - english AB - In this study, we investigated the optimization of the range modulator. Range modulator used in proton radiotherapy is expected to be accurate enough to achieve spread-out Bragg peak(SOBP). Based on the theory of Thomas Bortfeld, four different range modulator models were designed and compared by using the FLUKA simulation codes. The four models are: uneven ridge filter, smooth ridge filter, uneven range modulator wheel, and smooth range modulator wheel. Using 100 MeV and 230 MeV proton beams, the dose spatial distribution of the four models were calculated when the SOBP sections were 3, 5, 10, and 20 cm. The results showed that in ideal motion condition, the four models all showed the ideal range modulation effect. The average value of the difference was less than 2%. The evenness of the smooth models is improved compared with the uneven models. The smooth ridge filter model performed best. On the basis of this model, we tried to realize the movement of the SOBP region by adding a binary shielding layer. The results showed that the SOBP region can move in a small range at the expense of acceptable accuracy error. This study provides a design reference for the range modulator in proton therapy, and provides a new technical scheme to fill the target area for precise therapy. PB - JACoW Publishing CP - Geneva, Switzerland SP - 204 EP - 207 KW - proton KW - simulation KW - target KW - radiation KW - scattering DA - 2023/10 PY - 2023 SN - 2673-5482 SN - 978-3-95450-212-7 DO - doi:10.18429/JACoW-CYCLOTRONS2022-WEPO002 UR - https://jacow.org/cyclotrons2022/papers/wepo002.pdf ER -