癌症调强放射治疗计划限环设置的初步研究

Q4 Health Professions
Y. Fan, G. Qiu, Q. Pan, F. Zhang, S. Luan
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引用次数: 1

摘要

背景:研究了限制环对癌症调强放射治疗(IMRT)方案设计中最终剂量分布的影响。材料与方法:选择2017年癌症患者20例。为每位患者设计了七个辐射束,极限环宽度(RW)分别设定为0.6、0.8、1.0和1.2cm。限制环的内径和目标区域(RD)之间的距离分别设定为0.6、0.8、1.0和1.2cm。计划中使用的其他参数设置在相同的位置。此外,还计算了一致性指数(CI)和同质性指数(HI),并对正常组织进行了评估。结果:在辐射束数相同、极限环与靶区距离相同的条件下,极限环越小,靶区CI越好,靶区HI越小。当限制环的尺寸设置为相同时,限制环离目标区域越近,目标区域中剂量的CI越好,目标区域的HI越小。结论:在中心型癌症中,当靶体积约为800cc时,当RW设定为0.8cm,RD设定为0.6cm时,获得最佳剂量分布。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
A primary study on setting the limit ring in intensity-modulated radiation therapy treatment planning in lung cancer
Background:The influence of the limit ring on the final dose distribution in the design of the lung cancer intensity-modulated radiation therapy (IMRT) plan was studied. Materials and Methods: A total of 20 patients with lung cancer in 2017 were selected. Seven radiation beams were designed for each patient, and the limit ring width (RW) was set at 0.6, 0.8, 1.0, and 1.2 cm, respectively. The distance between the inner diameter of the limit ring and the target area (RD) was set 0.6, 0.8, 1.0, and 1.2 cm, respectively. The other parameters used in the plan were set at the same position. In addition, the conformity index (CI) and homogeneity index (HI) were calculated, and normal tissues were assessed. Results: Under the condition of the same number of radiation beams and the same distance between the limit ring and the target area, the smaller the limit ring, the better the CI of the target area and the less the HI of the target area. When the size of the limit ring was set the same, the closer the limit ring was to the target area, the better the CI of the dose in the target area, and the less the HI of the target area. Conclusions: In central lung cancer, when the target volume is approximately 800 cc, the optimal dose distribution is obtained when the RW is set at 0.8 cm and the RD is set at 0.6 cm.
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来源期刊
Iranian Journal of Radiation Research
Iranian Journal of Radiation Research RADIOLOGY, NUCLEAR MEDICINE & MEDICAL IMAGING-
CiteScore
0.67
自引率
0.00%
发文量
0
审稿时长
>12 weeks
期刊介绍: Iranian Journal of Radiation Research (IJRR) publishes original scientific research and clinical investigations related to radiation oncology, radiation biology, and Medical and health physics. The clinical studies submitted for publication include experimental studies of combined modality treatment, especially chemoradiotherapy approaches, and relevant innovations in hyperthermia, brachytherapy, high LET irradiation, nuclear medicine, dosimetry, tumor imaging, radiation treatment planning, radiosensitizers, and radioprotectors. All manuscripts must pass stringent peer-review and only papers that are rated of high scientific quality are accepted.
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