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Background: This study was conducted to assess the dosimetric impact of FFF beam plans on high-grade brain neoplasms using the VMAT technique when compared with FF beam plans. Material and Methods: Thirty patients with high-grade brain neoplasms, who had received radiotherapy using VMAT technique retrospectively were selected for this study. All the patients were planned for VMAT using 6MV_FF beam and the same plan was re-optimized using 6MV_FFF beam keeping the same dose constraint. Radiotherapy dose distribution on planning target volume (PTV) and organs at risk (OAR), target conformity index (CI), Homogeneity Index (HI), Low dose volume in the patient (V5, V10, V20, and V30), and Integral dose to the whole body in both plans were compared. Results: The PTV coverage and OAR’s showed no significant differences in dose distribution between the FFF and FF beam VMAT planning. There was a reduction of the average maximum dose in the right eye, left eye, right optic nerve, and left optic nerve using FFF beams. The reduction in average low dose volume was observed in V5, V10, V20, V30, and Mean Dose. Also, a significant reduction was observed in the integral dose to the whole body using the FFF beam. Conclusions: Using FFF beams with VMAT is doable for the treatment of high-grade brain neoplasms, and the delivery mode of the FFF beam in VMAT may yield similar results to FF beam which should be confirmed in a large scale prospective clinical trial.
Słowa kluczowe
Rocznik
Tom
Strony
191--199
Opis fizyczny
Bibliogr. 40 poz., rys., tab.
Twórcy
autor
- Department of Radiation Oncology, All India Institute of Medical Sciences, Jodhpur, India
autor
- Department of Radiation Oncology, All India Institute of Medical Sciences, Jodhpur, India
autor
- Department of Radiation Oncology, All India Institute of Medical Sciences, Jodhpur, India
autor
- Department of Radiation Oncology, All India Institute of Medical Sciences, Jodhpur, India
autor
- Department of Radiation Oncology, All India Institute of Medical Sciences, Jodhpur, India
Bibliografia
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- 11. Treutwein M, Hipp M, Koelbl O, Dobler B. Volumetric‐modulated arc therapy and intensity‐modulated radiation therapy treatment planning for prostate cancer with flattened beam and flattening filter free linear accelerators. J Appl Clin Med Phys. 2017;18(5):307-314. https://doi.org/10.1002/acm2.12168
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- 19. Meshram MN, Pramanik S, Ranjith CP, Gopal SK, Dobhal R. Dosimetric properties of equivalent-quality flattening filter-free (FFF) and flattened photon beams of Versa HD linear accelerator. Journal of Applied Clinical Medical Physics. 2016;17(3):358-370. https://doi.org/10.1120/jacmp.v17i3.6173
- 20. ICRU Report 83: Prescribing, Recording, and Reporting Photon-Beam Intensity-Modulated Radiation Therapy (IMRT); International Commission on Radiation Units and Measurements (ICRU). Journal of the ICRU. 2010;10(1). https://doi.org/10.1093/jicru_ndq001
- 21. Wu Q, Mohan R, Morris M, Lauve A, Schmidt-Ullrich R. Simultaneous integrated boost intensity-modulated radiotherapy for locally advanced head-and-neck squamous cell carcinomas. I: dosimetric results. International Journal of Radiation Oncology, Biology, Physics. 2003;56(2):573-585. https://doi.org/10.1016/S0360-3016(02)04617-5
- 22. Riet A van’t, Mak ACA, Moerland MA, Elders LH, van der Zee W. A conformation number to quantify the degree of conformality in brachytherapy and external beam irradiation: Application to the prostate. International Journal of Radiation Oncology, Biology, Physics. 1997;37(3):731-736. https://doi.org/10.1016/S0360-3016(96)00601-3
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- 25. Reggiori G, Mancosu P, Castiglioni S, et al. Can volumetric modulated arc therapy with flattening filter free beams play a role in stereotactic body radiotherapy for liver lesions? A volume-based analysis: SBRT with FFF VMAT for liver metastasis. Med Phys. 2012;39(2):1112-1118. https://doi.org/10.1118/1.3679858
- 26. Lang S, Shrestha B, Graydon S, et al. Clinical application of flattening filter free beams for extracranial stereotactic radiotherapy. Radiotherapy and Oncology. 2013;106(2):255-259. https://doi.org/10.1016/j.radonc.2012.12.012
- 27. Dang TM, Peters MJ, Hickey B, Semciw A. Efficacy of flattening-filter-free beam in stereotactic body radiation therapy planning and treatment: A systematic review with meta-analysis. J Med Imaging Radiat Oncol. 2017;61(3):379-387. https://doi.org/10.1111/1754-9485.12583
- 28. Jia F, Xu D, Yue H, Wu H, Li G. Comparison of Flattening Filter and Flattening Filter-Free Volumetric Modulated Arc Radiotherapy in Patients with Locally Advanced Nasopharyngeal Carcinoma. Med Sci Monit. 2018;24:8500-8505. https://doi.org/10.12659/MSM.910218
- 29. Ong CL, Dahele M, Cuijpers JP, Senan S, Slotman BJ, Verbakel WFAR. Dosimetric Impact of Intrafraction Motion During RapidArc Stereotactic Vertebral Radiation Therapy Using Flattened and Flattening Filter-Free Beams. International Journal of Radiation Oncology, Biology, Physics. 2013;86(3):420-425. https://doi.org/10.1016/j.ijrobp.2012.12.028
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- 35. Ong CL, Dahele M, Cuijpers JP, Senan S, Slotman BJ, Verbakel WFAR. Dosimetric Impact of Intrafraction Motion During RapidArc Stereotactic Vertebral Radiation Therapy Using Flattened and Flattening Filter-Free Beams. International Journal of Radiation Oncology, Biology, Physics. 2013;86(3):420-425. https://doi.org/10.1016/j.ijrobp.2012.12.028
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- 38. King RB, Hyland WB, Cole AJ, et al. An in vitro study of the radiobiological effects of flattening filter free radiotherapy treatments. Phys Med Biol. 2013;58(5):N83-N94. https://doi.org/10.1088/0031-9155/58/5/N83
- 39. Lohse I, Lang S, Hrbacek J, et al. Effect of high dose per pulse flattening filter-free beams on cancer cell survival. Radiotherapy and Oncology. 2011;101(1):226-232. https://doi.org/10.1016/j.radonc.2011.05.072
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Uwagi
Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2021).
Typ dokumentu
Bibliografia
Identyfikator YADDA
bwmeta1.element.baztech-74ef0305-ae3c-403c-b7f9-c069b047b184