[医用直线加速器CBCT不同扫描条件对图像质量的影响分析]。

Q4 Medicine

中国医疗器械杂志 Pub Date : 2025-03-30 DOI:10.12455/j.issn.1671-7104.240480

Li Liu, Chengwei Ye, Jianjun Yuan, Yingui Luo, Zhiyao Luo, Wei Zeng, Ling Li, Huan Liu, Yan Liu

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引用次数: 0

摘要

目的：探讨不同扫描条件对医用电子加速器锥束计算机断层扫描（CBCT）成像质量的影响，为不同身体部位扫描条件的选择提供参考。方法设置不同的扫描条件，对Catphan 503幻影进行CBCT参数扫描，分析空间分辨率、噪声、均匀性、空间几何精度和低对比度分辨率对CBCT图像质量的影响。结果：对于头部、胸部和腹部，随着扫描参数值的增加，噪声值分别下降了47.4%、26.1%和51.3%，均匀性值分别下降了30.2%、26.6%和47.9%。低对比度分辨率值分别下降了50.6%、34.2%和12.0%。不同扫描条件对空间几何精度和空间分辨率的影响不显著。结论：不同扫描参数对医用电子加速器CBCT成像质量有一定影响。可根据患者个体选择较低的扫描参数，减少附加辐射剂量，为CBCT图像引导在放疗中的安全应用提供参考。

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[Analysis of the Influence of Different Scanning Conditions of Medical Linear Accelerator CBCT on Image Quality].

Objective: To investigate the influence of different scanning conditions on the image quality of medical electron accelerator cone-beam computed tomography (CBCT) and provide a reference for the selection of scanning conditions for different body parts. Methods Set different scanning conditions, the Catphan 503 phantom was scanned using CBCT parameters to analyze the influence of spatial resolution, noise, uniformity, spatial geometric accuracy, and low-contrast resolution on the image quality of CBCT.

Results: For the head, chest, and abdomen, with the increase in scanning parameter values, the noise value decreased by 47.4%, 26.1%, and 51.3% respectively, and the uniformity values decreased by 30.2%, 26.6%, and 47.9% respectively. The low-contrast resolution values decreased by 50.6%, 34.2%, and 12.0%. The influence of different scanning conditions on spatial geometric accuracy and spatial resolution is not significant.

Conclusion: Different scanning parameters have a certain influence on the image quality of medical electron accelerator CBCT. Lower scanning parameters can be selected based on individual patients to reduce the additional radiation dose, providing a reference for the safe application of CBCT image guidance in radiotherapy.

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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.