Comparison of six irradiation techniques for delivering hypofractionated whole-breast radiotherapy with a simultaneous integrated boost after breast-conserving surgery

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ZHANG J.; WU S.G.; Sun j.y.; LI F.Y.; Guan x.x.; He z.y.

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Journal: International Journal of Radiation Research Year:2018 | Volume:16 | Issue:3 Page(s): 269-278

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Title

Comparison of six irradiation techniques for delivering hypofractionated whole-breast radiotherapy with a simultaneous integrated boost after breast-conserving surgery

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Keywords

Breast cancer

breast-conserving surgery

hypofractionated whole-breast radiotherapy

radiotherapy

simultaneous integrated b

moost

Abstract

Background: To compare the following techniques for hypofrac onated whole-breast irradia on (WBI) with simultaneous integrated boost (SIB) a er breast-conserving surgery (BCS): three-dimensional conformal radia on therapy plus electron boost (3DCRT-EB), intensity-modulated radia on therapy (IMRT) plus EB (IMRT-EB), field-in-field IMRT plus EB (FIF-IMRT-EB), FIF-IMRT plus IMRT boost (FIF-IMRT-IB), IMRT plus IMRT boost (IMRT-IB), and volumetric-modulated arc therapy (VMAT) plus VMAT boost (VMAT-VB). Materials and Methods: Twenty pa ents with le Breast cancer were enrolled. The prescribed dose was 40. 05 Gy in 15 frac ons to the whole breast and an SIB to the tumor bed of 3. 2 Gy/frac on (total, 48 Gy). Target-volume coverage, dose-conformity index, homogeneity index (HI), doses to organs at risk (OAR), and costs were compared. Results: FIF-IMRT-EB performed the best, while FIF-IMRT-IB, IMRT-IB, and VMAT-VB performed the worst. The mean dose to the planning target volume for breast evalua on (PTV Eval-breast) was significantly lower for IMRT-EB and FIF-IMRT-EB than for the other plans. For both PTV Eval-breast and PTV Eval-boost, VMAT-VB had the lowest target-volume coverage for 95% of the prescrip on dose and the highest target-volume coverage for >105% of the prescrip on dose. Among the six plans, VMAT-VB had the best HI for PTV Eval-boost and the highest doses to all OAR, except the coronary artery. Plans with EBs had lower mean doses for the contralateral lung and contralateral breast than plans with IMRT boosts. FIF-IMRT-EB had a low cost; plans with IMRT boosts had the highest costs. Conclusion: FIF-IMRT-EB may be the most suitable irradia on technique for hypofrac onated WBI with SIB a er BCS.

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APA: Copy

ZHANG, J., WU, S.G., Sun, j.y., LI, F.Y., Guan, x.x., & He, z.y.. (2018). Comparison of six irradiation techniques for delivering hypofractionated whole-breast radiotherapy with a simultaneous integrated boost after breast-conserving surgery. INTERNATIONAL JOURNAL OF RADIATION RESEARCH, 16(3), 269-278. SID. https://sid.ir/paper/286742/en

Vancouver: Copy

ZHANG J., WU S.G., Sun j.y., LI F.Y., Guan x.x., He z.y.. Comparison of six irradiation techniques for delivering hypofractionated whole-breast radiotherapy with a simultaneous integrated boost after breast-conserving surgery. INTERNATIONAL JOURNAL OF RADIATION RESEARCH[Internet]. 2018;16(3):269-278. Available from: https://sid.ir/paper/286742/en

IEEE: Copy

J. ZHANG, S.G. WU, j.y. Sun, F.Y. LI, x.x. Guan, and z.y. He, “Comparison of six irradiation techniques for delivering hypofractionated whole-breast radiotherapy with a simultaneous integrated boost after breast-conserving surgery,” INTERNATIONAL JOURNAL OF RADIATION RESEARCH, vol. 16, no. 3, pp. 269–278, 2018, [Online]. Available: https://sid.ir/paper/286742/en

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