乳腺组织液影和模型电磁特性变化对超宽带射频肿瘤检测系统性能的影响

IF 1.7 4区 工程技术 Q3 ENGINEERING, ELECTRICAL & ELECTRONIC
Marwa Slimi, Bassem Jmai, Paulo Mateus Mendes, Ali Gharsallah
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引用次数: 0

摘要

正如在许多医疗设备系统的发展,射频乳房肿瘤检测系统的设计经历了一个基于使用液体幻影的测试阶段。众所周知,在长时间保持这种特性的同时,要获得精确模拟每个组织的每个感兴趣的频率的模型是很困难的。尽管已有许多使用这种幽灵的研究,但对使用不精确的幽灵可能对射频系统特性产生的影响进行系统分析的信息有限。本工作介绍了超宽带液体乳房和肿瘤幻象的设计和制造。这种方法的主要问题是不正确的幻像属性以及不正确的频率响应会导致评估错误。目前的研究重点主要集中在模型上,而不是其电磁特性。通常,乳房幻象的电磁特性仅在很小的频率范围内是准确的,而且这些特性与频率有关。为了解决这个问题,我们在[1-6]GHz的宽频率范围内验证了均匀乳房模体,在介电常数(1.613% <;误差<; 3.22%)和损耗正切(误差<; 33%)方面取得了良好的效果。所提出的模体在相当长的一段时间内保持其性能,在制造后暴露于环境中的2小时内仅降解6.78%。在容器中保存9个月后,仅发生±1.7%的微小变化。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Impact of Electromagnetic Property Variations in Breast Tissue Liquid Phantoms and Models on the Performance of UWB Radiofrequency Tumor Detection Systems

As in many medical device systems development, the design of radiofrequency breast tumor detection systems undergoes a test phase based on the use of liquid phantoms. It is well known the difficulty in obtaining phantoms that precisely model each tissue for each frequency of interest while keeping such properties for a long time. Despite the many available studies using such phantoms, limited information is available on a systematic analysis of the effect that the use of an imprecise phantom may have on the characterization of radiofrequency systems. This work presents the design and fabrication of ultra-wideband liquid breast and tumor phantoms. The main issue with this approach is that incorrect phantom properties, as well as an incorrect frequency response, lead to assessment errors. The current research focus is mainly focused on the model of the phantom, rather than its electromagnetic properties. Typically, the EM properties of breast phantoms are accurate only in a small frequency range, and these properties are frequency dependent. To address this issue, we validated a homogeneous breast phantom with good results in terms of dielectric permittivity (1.613% < error < 3.22%) and loss tangent (error < 33%) in the wide frequency range of [1–6] GHz. The proposed phantom retains its properties for a significant period of time, degrading only 6.78% in 2 h after fabrication while exposed to the environment. When it is stored in a container, only a small variation of ±1.7% was registered after 9 months.

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来源期刊
CiteScore
4.60
自引率
6.20%
发文量
101
审稿时长
>12 weeks
期刊介绍: Prediction through modelling forms the basis of engineering design. The computational power at the fingertips of the professional engineer is increasing enormously and techniques for computer simulation are changing rapidly. Engineers need models which relate to their design area and which are adaptable to new design concepts. They also need efficient and friendly ways of presenting, viewing and transmitting the data associated with their models. The International Journal of Numerical Modelling: Electronic Networks, Devices and Fields provides a communication vehicle for numerical modelling methods and data preparation methods associated with electrical and electronic circuits and fields. It concentrates on numerical modelling rather than abstract numerical mathematics. Contributions on numerical modelling will cover the entire subject of electrical and electronic engineering. They will range from electrical distribution networks to integrated circuits on VLSI design, and from static electric and magnetic fields through microwaves to optical design. They will also include the use of electrical networks as a modelling medium.
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