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IEEE Journal of Electromagnetics, RF, and Microwaves in Medicine and Biology About this Journal 医学和生物学中的电磁学、射频和微波
IF 3 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC Pub Date : 2025-02-20 DOI: 10.1109/JERM.2025.3539041
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引用次数: 0
IEEE Journal of Electromagnetics, RF and Microwaves in Medicine and Biology Publication Information 医学和生物学中的电磁学、射频和微波杂志
IF 3 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC Pub Date : 2025-02-20 DOI: 10.1109/JERM.2025.3539043
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引用次数: 0
Quantifying Consistency of Microwave Breast Imaging: Laser Scanning for Assessing Breast Volume and Shape 微波乳房成像的一致性量化:激光扫描评估乳房体积和形状
IF 3.2 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC Pub Date : 2025-02-06 DOI: 10.1109/JERM.2025.3531693
Carina M. Butterworth;Pedram Mojabi;Elise C. Fear
Microwave breast imaging is a promising approach that requires additional information such as the position, shape, and volume of the breast in the system for rigorous validation. The objectives of this proof-of-concept study were to develop a workflow to calculate the shape and volume of a breast positioned in contact with two imaging plates and to apply this workflow to assess the consistency of breast placement at sequential scans. The use of externally placed laser scanners facilitates capturing the shape and volume of the breast when positioned in the microwave system. A workflow was developed to estimate regions lacking observable measurements from the laser scanners, specifically implementing meshing, filtering, and surface estimation. The consistency of the breast shape and volume at sequential scans was quantified with the Dice coefficient, modified Hausdorff distance (MHD), and Fréchet distance. The study achieved an average Dice coefficient of 0.74 and MHD better than 10 mm, with the average below 4 mm. The Fréchet distances were higher than the MHD but demonstrated consistency with the phantom. Overall, this work demonstrates consistent placement of the breast at sequential scans and provides a framework for further investigation into the microwave signals and images.
微波乳房成像是一种很有前途的方法,需要额外的信息,如乳房在系统中的位置、形状和体积,以进行严格的验证。这项概念验证研究的目的是开发一个工作流程来计算与两个成像板接触的乳房的形状和体积,并应用该工作流程来评估连续扫描时乳房放置的一致性。当放置在微波系统中时,使用外部放置的激光扫描仪有助于捕获乳房的形状和体积。开发了一个工作流程来估计缺乏激光扫描仪可观察测量的区域,特别是实现网格划分,滤波和表面估计。通过Dice系数、修正Hausdorff距离(MHD)和fr距离来量化连续扫描时乳房形状和体积的一致性。研究结果表明,平均Dice系数为0.74,MHD优于10 mm,平均小于4 mm。与MHD相比,fsm的距离更高,但与幻影的距离一致。总的来说,这项工作证明了连续扫描中乳房的一致位置,并为进一步研究微波信号和图像提供了框架。
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引用次数: 0
A GaAs MMIC Correlation-Dicke Radiometer With Compact Antenna for Internal Body Thermometry 一种具有紧凑天线的GaAs MMIC相关dick辐射计用于体内温度测量
IF 3 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC Pub Date : 2025-01-27 DOI: 10.1109/JERM.2024.3525405
Jooeun Lee;Zoya Popović
In this paper, we present a 1.4 GHz on-chip correlation-Dicke hybrid radiometer designed for internal body thermometry. The GaAs Monolithic Microwave Integrated Circuit (MMIC) measures 3.8 mm by 2.3 mm and includes two 90° hybrid couplers, a single-stage Low-Noise Amplifier (LNA) in each path, and a switch. The radiometer input is connected to a planar compact near-field circular slot-patch antenna placed on the skin and designed to receive noise power from subcutaneous tissues. To enhance robustness against input impedance mismatch, two single-stage LNAs are positioned between the two hybrid couplers. The circuit demonstrates a gain of 13.4 dB, isolation of 16 dB, and a noise figure of 1.31 dB. Following the switch, an off-the-shelf band-pass filter, an on-chip 3-stage LNA, and a detector are connected to provide a dc output proportional to the received thermal noise from the near-field antenna. Performance is evaluated through both phantom and in-vivo measurements. The 2-layer phantom measurement shows an average error of 0.35 °C, while in-vivo measurements show an average 0.72 °C error, demonstrating the device's ability to track internal temperature accurately. Additionally, repeatability tests are conducted on multiple human cheeks multiple times and on multiple days.
本文设计了一种1.4 GHz片上相关-迪克混合辐射计,用于人体体温测量。GaAs单片微波集成电路(MMIC)尺寸为3.8 mm × 2.3 mm,包括两个90°混合耦合器,每个通路中的单级低噪声放大器(LNA)和一个开关。辐射计输入连接到放置在皮肤上的平面紧凑型近场圆形狭缝贴片天线,该天线设计用于接收来自皮下组织的噪声功率。为了增强对输入阻抗失配的鲁棒性,在两个混合耦合器之间放置了两个单级LNAs。该电路的增益为13.4 dB,隔离度为16 dB,噪声系数为1.31 dB。在开关之后,连接一个现成的带通滤波器、片上3级LNA和检测器,以提供与近场天线接收的热噪声成比例的直流输出。通过模拟和体内测量来评估性能。两层模体测量显示平均误差为0.35°C,而体内测量显示平均误差为0.72°C,证明了该设备准确跟踪内部温度的能力。此外,可重复性测试在多个人的脸颊上进行多次和多天。
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引用次数: 0
Broadband Wide-Angle Absorber for Microwave Imaging of Tissue 用于组织微波成像的宽带广角吸收器
IF 3 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC Pub Date : 2025-01-27 DOI: 10.1109/JERM.2025.3529656
Zhen-Yuan Zhang;Golap K. Dey;Nooshin V. Shahmirzadi;Natalia K. Nikolova
A broadband wide-angle absorbing structure for the non-reflective termination of tissue is proposed for enclosures needed in microwave tissue imaging. A prototype consisting of 10 × 10 unit cells is fabricated and experimentally tested using breast-tissue phantoms. Through simulations and measurements, it is demonstrated that the proposed absorbing structure achieves a reflection coefficient better than −20 dB for TE polarization and better than −12 dB for TM polarization for incidence angles from 0° to 80° and within the frequency band from 3 GHz to 8 GHz. The design principles are delineated, enabling the development of other absorbing structures suitable for any tissue of interest. A calibration method and procedure are also developed and employed with the reported measurements, which allow for de-embedding the effect of the lossy tissue medium and extracting the intrinsic reflection coefficient of the absorber. The proposed structure demonstrates superior absorption compared to prior designs and provides a much-needed solution for the construction of non-reflective enclosures for microwave biomedical imaging applications.
提出了一种用于组织非反射端部的宽带广角吸收结构,用于微波组织成像中所需的封装。制作了一个由10 × 10单元细胞组成的原型,并使用乳房组织模型进行了实验测试。仿真和测量结果表明,在3 GHz ~ 8 GHz频段内,在入射角为0°~ 80°范围内,该吸收结构对TE极化的反射系数优于- 20 dB,对TM极化的反射系数优于- 12 dB。描述了设计原则,使其他吸收结构适合任何感兴趣的组织的发展。本文还开发了一种校准方法和程序,并将其与所报告的测量一起使用,该方法和程序允许去嵌入有损组织介质的影响并提取吸收器的固有反射系数。与先前的设计相比,所提出的结构具有更好的吸收性能,为微波生物医学成像应用的非反射外壳的构建提供了急需的解决方案。
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引用次数: 0
Experimental Assessment of a Smart Skin for Temperature Monitoring During Superficial Microwave Hyperthermia 用于表面微波热疗过程中温度监测的智能皮肤的实验评估
IF 3.2 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC Pub Date : 2025-01-17 DOI: 10.1109/JERM.2024.3524679
Francesco Lestini;Alessandro DiCarlofelice;Piero Tognolatti;Gaetano Marrocco;Cecilia Occhiuzzi
This paper presents the thermal validation of a Radio-Thermal Monitoring Sheet (R-TMS) designed for monitoring microwave hyperthermia treatments. The R-TMS consists of a grid of 77 passive Ultra High Frequency (UHF) Radio Frequency Identification (RFID) temperature sensors, which are wirelessly interrogated by an external reader integrated within the hyperthermia system, sharing the same antenna. The system was designed to ensure minimal interference with the therapeutic electromagnetic field while providing real-time feedback on skin temperature during the therapy. Laboratory assessments demonstrated the system's robustness against high-power electromagnetic fields, showing no significant self-heating or signal degradation. Pre-clinical tests confirmed that the R-TMS does not compromise treatment effectiveness or patient safety, with temperature monitoring results closely matching those obtained from conventional thermocouple-based methods. The proposed system offers a promising low-cost, wireless alternative for enhancing the safety and efficacy of superficial hyperthermia treatments.
本文介绍了一种用于监测微波热疗治疗的无线电热监测片(R-TMS)的热验证。R-TMS由77个无源超高频(UHF)射频识别(RFID)温度传感器组成,这些传感器通过集成在热疗系统中的外部读取器进行无线查询,共享相同的天线。该系统旨在确保对治疗电磁场的干扰最小,同时在治疗过程中提供皮肤温度的实时反馈。实验室评估证明了该系统对大功率电磁场的鲁棒性,没有明显的自热或信号退化。临床前试验证实,R-TMS不会影响治疗效果或患者安全,其温度监测结果与传统基于热电偶的方法获得的结果非常接近。提出的系统为提高表面热疗的安全性和有效性提供了一种有前途的低成本无线替代方案。
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引用次数: 0
A Novel Dielectric Fingerprinting Tool for Histopathology Assessment Leveraging AI and RF: A Feasibility Study Using Gastrointestinal Tissues 利用人工智能和射频技术进行组织病理学评估的新型介质指纹识别工具:利用胃肠道组织的可行性研究
IF 3.2 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC Pub Date : 2025-01-13 DOI: 10.1109/JERM.2024.3523861
Sunil Gaddam;Poulami Samaddar;Keerthy Gopalakrishnan;Mansunderbir Singh;Priyanka Anvekar;Suganti Shivaram;Shuvashis Dey;Sayan Roy;Dipankar Mitra;Shivaram P. Arunachalam
Digital representation of tissues allows the examination of tissue morphology in new ways enabling patient stratification for effective treatments. Current slide-scanning techniques capture the visible details of the tissue as whole-slide images and digitally record them in the form of spatial and color relationships. Specialized experimental techniques like dielectric spectroscopy can also be used to investigate a tissue's response to an applied electric field. This study used the dielectric spectroscopy method to collect the complex permittivity of healthy and abnormal biopsy tissues excised during Gastroenterology procedures. A single pole Cole-Cole model is fitted to the measurements dataset to extract the Cole-Cole parameters which are used as features in the machine learning binary classification model. The model's performance demonstrates the feasibility of using microwave-based spectroscopy measurements to create a digital dielectric fingerprint for tissues under investigation.
组织的数字表示允许以新的方式检查组织形态,使患者分层以进行有效的治疗。当前的幻灯片扫描技术以整个幻灯片图像的形式捕捉组织的可见细节,并以空间和颜色关系的形式进行数字记录。专门的实验技术,如介电光谱,也可以用来研究组织对外加电场的反应。本研究使用介电光谱法收集在胃肠病学手术中切除的健康和异常活检组织的复杂介电常数。将单极Cole-Cole模型拟合到测量数据集上,提取Cole-Cole参数作为机器学习二分类模型的特征。该模型的性能证明了利用微波光谱测量为研究组织创建数字介电指纹的可行性。
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引用次数: 0
Revisiting the Impact of Inter-Channel Coupling and Thermal Noise Correlation on MRI Receive-Array Performance: A Simulation Study 通道间耦合和热噪声相关对MRI接收阵列性能影响的模拟研究
IF 3.2 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC Pub Date : 2024-12-18 DOI: 10.1109/JERM.2024.3509589
Paul-François Gapais;Michel Luong;Alexis Amadon
In modern magnetic resonance imaging scanners, the signal reception is carried out by a phased array of 32 resonators or more. The electromagnetic coupling between channels becomes stronger as the density of resonators, or RF coils, increases. The inter-channel coupling has generally been considered an adverse effect that should be mitigated to provide the highest signal-to-noise ratio and the lowest g-factor. Both are related to the resolution or quality of the images. The numerical simulations of this study show that this mitigation is unnecessary as long as only the contribution of thermal noise is considered.
在现代磁共振成像扫描仪中,信号接收是由32个或更多的谐振器组成的相控阵进行的。随着谐振器或射频线圈密度的增加,通道之间的电磁耦合变得更强。信道间耦合通常被认为是一种不利影响,应该加以缓解,以提供最高的信噪比和最低的g因子。两者都与图像的分辨率或质量有关。本研究的数值模拟表明,只要只考虑热噪声的贡献,这种缓解是不必要的。
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引用次数: 0
Electrophoretic Absorption of Ellipsoidal Gold Nanoparticles—A Parameter Study 椭圆型纳米金粒子的电泳吸收-参数研究
IF 3.2 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC Pub Date : 2024-12-16 DOI: 10.1109/JERM.2024.3509216
Brage Bøe Svendsen;Mariana Dalarsson
This paper investigates the RF electrophoretic response of ellipsoidal gold nanoparticles (AuNPs). Since the existing works generally consider the electrophoretic heating of spherical AuNPs, this work provides an important step towards understanding the behavior of ellipsoidal AuNPs. We first develop an analytical framework for modeling of electrophoretic response of ellipsoidal AuNPs. Thereafter, due to the lack of experimental studies of non-spherical electrophoretic RF heating of AuNPs, we validate our theory by comparison to the existing experimental results of spherical AuNPs as a special case, and estimate a few additional parameters not considered before. Then, parameter studies are performed on surface charge, friction constant, frequency, and ionic background, with respect to AuNP size and shape. Finally, we present new results for the electromagnetic absorption and heat rates of ellipsoidal AuNPs in human tissue. Our results from the tissue testing indicate a strong difference between aqueous media and realistic human tissues due to the major difference in the host medium viscosity. We demonstrate the electrophoresis' strong dependency on the host medium's viscosity, where we note that cancer tissue viscosity is more than a thousand times higher than that of water. We thereby confirm negative results for RF AuNP heating, indicated by our own previous study and two other previous studies. Our results provide important insights into the feasibility of RF AuNP heating in a medical context
本文研究了椭球状金纳米颗粒(AuNPs)的射频电泳响应。由于现有的工作一般考虑球形AuNPs的电泳加热,这项工作为理解椭球状AuNPs的行为提供了重要的一步。我们首先开发了一个分析框架来模拟椭球状AuNPs的电泳响应。此后,由于缺乏对AuNPs非球形电泳射频加热的实验研究,我们以球形AuNPs为特例,通过与已有实验结果的对比来验证我们的理论,并估计了一些之前没有考虑到的额外参数。然后,对表面电荷、摩擦常数、频率和离子背景进行了参数研究,并与AuNP的尺寸和形状有关。最后,我们提出了椭球状AuNPs在人体组织中的电磁吸收和热率的新结果。我们的组织测试结果表明,由于宿主介质粘度的主要差异,水介质和真实人体组织之间存在很大差异。我们证明了电泳对宿主介质粘度的强烈依赖性,其中我们注意到癌组织的粘度比水的粘度高一千多倍。因此,我们确认了RF AuNP加热的阴性结果,这是我们自己之前的研究和其他两个先前的研究表明的。我们的研究结果为射频AuNP加热在医学领域的可行性提供了重要的见解
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引用次数: 0
2024 Index IEEE Journal of Electromagnetics, RF and Microwaves in Medicine and Biology Vol. 8 电磁学,射频和微波在医学和生物学第8卷
IF 3 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC Pub Date : 2024-12-11 DOI: 10.1109/JERM.2024.3512633
{"title":"2024 Index IEEE Journal of Electromagnetics, RF and Microwaves in Medicine and Biology Vol. 8","authors":"","doi":"10.1109/JERM.2024.3512633","DOIUrl":"https://doi.org/10.1109/JERM.2024.3512633","url":null,"abstract":"","PeriodicalId":29955,"journal":{"name":"IEEE Journal of Electromagnetics RF and Microwaves in Medicine and Biology","volume":"8 4","pages":"401-414"},"PeriodicalIF":3.0,"publicationDate":"2024-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10781463","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142810447","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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IEEE Journal of Electromagnetics RF and Microwaves in Medicine and Biology
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