Short report: Adaptive approach for nasopharyngeal carcinoma patients during Volumetric Modulated Arc Therapy treatment (VMAT)

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Chibane B.I.; Benrachi F.; Salah Bali M.

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Journal Paper

Paper Information

Journal: International Journal of Radiation Research Year:2020 | Volume:18 | Issue:2 Page(s): 369-374

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Title

Short report: Adaptive approach for nasopharyngeal carcinoma patients during Volumetric Modulated Arc Therapy treatment (VMAT)

Author(s)

Chibane B.I. | Benrachi F. | Salah Bali M. | Issue Writer Certificate

Keywords

Adaptive radiotherapy

nasopharyngeal cancer

Volumetric Modulated Arc therapy

Abstract

Background: Patients with head-and-neck cancers receiving radiotherapy show significant anatomical and dosimetric changes, especially during the latter part of treatment. The aim of this study is to evaluate the dosimetric effects of an adaptive Volumetric Modulated Arc therapy (VMAT) treatment protocol for patients with locally advanced nasopharyngeal cancer (NPC). Material and methods: Ten patients treated with VMAT have benefited from a second computed tomography scan (CT2) after 15 fractions in order to apply a new adapted plan. A hybrid plan has been generated applying the original treatment plan configuration beam to the second CT scan. The dose– volume histograms (DVHs) of hybrid and adapted plans have been compared. Results: At the end of the 3rd week of treatment, CT2 shows a considerable shrinkage of GTV N70 volume (45. 2%) and a diminution of the left and right parotid glands volume (21. 1%, 20. 6% respectively). Compared to the initial plans, hybrid plans reveal that the dose delivered to target volume GTV N70 decreased by 15. 2%, and the V30 of the left and right parotid glands increased by 47. 3% and 25. 6% respectively. However, there is no significant difference for the D2 of the brainstem and spinal cord. Conclusion: Our adaptive VMAT protocol improves dosimetric results in terms of GTV N70 coverage and nontoxic doses to parotid glands.

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APA: Copy

Chibane, B.I., Benrachi, F., & Salah Bali, M.. (2020). Short report: Adaptive approach for nasopharyngeal carcinoma patients during Volumetric Modulated Arc Therapy treatment (VMAT). INTERNATIONAL JOURNAL OF RADIATION RESEARCH, 18(2), 369-374. SID. https://sid.ir/paper/758670/en

Vancouver: Copy

Chibane B.I., Benrachi F., Salah Bali M.. Short report: Adaptive approach for nasopharyngeal carcinoma patients during Volumetric Modulated Arc Therapy treatment (VMAT). INTERNATIONAL JOURNAL OF RADIATION RESEARCH[Internet]. 2020;18(2):369-374. Available from: https://sid.ir/paper/758670/en

IEEE: Copy

B.I. Chibane, F. Benrachi, and M. Salah Bali, “Short report: Adaptive approach for nasopharyngeal carcinoma patients during Volumetric Modulated Arc Therapy treatment (VMAT),” INTERNATIONAL JOURNAL OF RADIATION RESEARCH, vol. 18, no. 2, pp. 369–374, 2020, [Online]. Available: https://sid.ir/paper/758670/en

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