锥形束CT图像在骨盆肿瘤剂量计算中的准确性评估。

Q4 Medicine

中国医疗器械杂志 Pub Date : 2025-05-30 DOI:10.12455/j.issn.1671-7104.240655

Bao Li, Yongzhong Chen, Jun Jin, Longjun Yan, Xiaoyong Wang

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引用次数: 0

摘要

目的：评价锥束CT （cone-beam CT， CBCT）图像在盆腔肿瘤放疗剂量计算中的可行性和准确性。方法：采用改进的体积密度覆盖法建立CBCT图像的CT值-相对电子密度（RED）曲线。在保持优化参数不变的情况下，将规划的CT平面图转换为CBCT图像，利用构建的密度曲线计算CBCT平面图的剂量。分析了两种方案的剂量计算偏差。结果：两种方案靶体积和危及器官（OAR）剂量学参数的平均差异分别小于1%和1.5%。目标符合性指数（CI）、均匀性指数（HI）和伽马通过率高度一致，无统计学意义差异。结论：经该方法校正后的CBCT图像可用于盆腔肿瘤放疗计划的剂量计算。

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[Accuracy Assessment of Cone-Beam CT Images for Pelvic Tumor Dose Calculation].

Objective: To evaluate the feasibility and accuracy of cone-beam CT (CBCT) images for radiotherapy dose calculation in pelvic tumors.

Methods: An improved volumetric density coverage method was used to establish CT value-relative electron density (RED) curves for CBCT images. The planning CT plans were transferred to the CBCT images, and the constructed density curves were applied to calculate doses for CBCT plans while maintaining the optimization parameters unchanged. Dose calculation deviations between the two plans were analyzed.

Results: The mean differences in dosimetric parameters for the target volume and organs at risk (OAR) between the two plans were less than 1% and 1.5%, respectively. The target conformity index (CI), homogeneity index (HI), and gamma passing rates were highly consistent, with no statistically significant differences.

Conclusion: CBCT images corrected by this method can be used for dose calculation in pelvic tumor radiotherapy planning.

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来源期刊

中国医疗器械杂志 Medicine-Medicine (all)

CiteScore

0.40

自引率

0.00%

发文量

8086

期刊介绍： Chinese Journal of Medical Instrumentation mainly reports on the development, progress, research and development, production, clinical application, management, and maintenance of medical devices and biomedical engineering. Its aim is to promote the exchange of information on medical devices and biomedical engineering in China and turn the journal into a high-quality academic journal that leads academic directions and advocates academic debates.