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A Dosimetric Comparative Study of Carbon-Ion Radiotherapy Versus X-ray Volumetric Modulated Arc Therapy for Stage III Non-Small-Cell Lung Cancer

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机构： [1]Heavy Ion Radiotherapy Department, Wuwei Cancer Hospital and Institute, Wuwei Academy of Medical Sciences, Wuwei, Gansu, China. [2]Radiotherapy Center, Radiation Oncology Key Laboratory of Sichuan Province, Sichuan Clinical Research Center for Cancer, Sichuan Cancer Hospital and Institute, Sichuan Cancer Center, Affiliated Cancer Hospital of University of Electronic Science and Technology of China, Chengdu, Sichuan, China.

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关键词： Carbon‑ion radiotherapy dose‑volume parameters dosimetric comparison non‑small‑cell lung cancer volume‑modulated arc therapy (VMAT

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Compared to photon beam, carbon-ion radiotherapy (CIRT) has both physical and biological advantages.To examine whether two-dimensional (2D) CIRT is dosimetrically superior to photon beam volume-modulated arc therapy (VMAT) in protecting the normal tissues for stage III non-small-cell lung cancer (NSCLC).A retrospective study was conducted. Thirteen patients with stage III NSCLC treated in our center with curative CIRT and a sham photon beam VMAT treatment planning with the same normal tissue dose constraints were included for analysis. Target dose distributions and the homogeneity index (HI) within the planning target volumes were compared.Both CIRT and VMAT plans have good tumor coverage with no significant differences in D98, D95, and D50 of Planning target volume 1 (PTV1) between the two plans. The HIs between the two plans are similar. The HI of PTV2 is superior in the CIRT plan (CIRT vs. VMAT: 0.08 vs. 0.16, P < 0.05). In general, CIRT results in a lower dose of the organ-at-risk (OAR) than the photon plans. The V5, V10, V20, V30, V40, and Dmean of the contralateral lung in the CIRT plan are significantly lower than that of the photon VMAT. For the ipsilateral lung, the V5 of CIRT is significantly lower. The CIRT also had significantly lower spinal cord Dmax, esophageal Dmean and V50, V10 and V30 of bone, and V50 of the trachea and bronchial tree.Compared with photon VMAT, 2D-CIRT using the passive beam scanning technique significantly reduces the radiation dose to the OARs in curative radiotherapy of stage III NSCLC, suggesting a better protection of the normal tissues.Copyright © 2024 Copyright: © 2024 Nigerian Journal of Clinical Practice.

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大类 | 4 区医学

小类 | 4 区医学：内科

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Q3 MEDICINE, GENERAL & INTERNAL

影响因子： 0.7 最新[2023版] 1.1 最新五年平均 0.7 出版当年[2023版] 0 出版当年五年平均 0.7 出版前一年[2023版]

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第一作者机构： [1]Heavy Ion Radiotherapy Department, Wuwei Cancer Hospital and Institute, Wuwei Academy of Medical Sciences, Wuwei, Gansu, China.

通讯作者：

通讯机构： [1]Heavy Ion Radiotherapy Department, Wuwei Cancer Hospital and Institute, Wuwei Academy of Medical Sciences, Wuwei, Gansu, China. [*1]Sichuan Cancer Hospital and Institute, No. 55, Section 4, South Renmin Road, Chengdu 10042, China.

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