IEEE Journal of Electromagnetics RF and Microwaves in Medicine and Biology最新文献_第8页

Advanced Microdosimetric and Neurofunctionalized Multiphysics on Stem Cells Models Under Microsecond Pulse Stimulation 微秒脉冲刺激下干细胞模型的高级微剂量学和神经功能化多物理场

IF 3

IEEE Journal of Electromagnetics RF and Microwaves in Medicine and Biology Pub Date : 2024-10-15 DOI: 10.1109/JERM.2024.3468024

Sara Fontana;Laura Caramazza;Micol Colella;Noemi Dolciotti;Alessandra Paffi;Victoria Moreno Manzano;Claudia Consales;Francesca Apollonio;Micaela Liberti

{"title":"Advanced Microdosimetric and Neurofunctionalized Multiphysics on Stem Cells Models Under Microsecond Pulse Stimulation","authors":"Sara Fontana;Laura Caramazza;Micol Colella;Noemi Dolciotti;Alessandra Paffi;Victoria Moreno Manzano;Claudia Consales;Francesca Apollonio;Micaela Liberti","doi":"10.1109/JERM.2024.3468024","DOIUrl":"https://doi.org/10.1109/JERM.2024.3468024","url":null,"abstract":"<bold>Objectives: in recent biomedical applications for regenerative and tissue engineering, the use of electric and magnetic fields is increasingly exploited. Among the wide application range, an innovative treatment for Spinal Cord Injury (SCI) is urgent. The European project RISEUP proposes a novel device development, that will provide highly intense microsecond pulsed electric fields (μsPEFs) to stimulate stem cells differentiation towards neuronal phenotypes, through an electroporation-driven process, and regenerate the lesioned tissue. Within RISEUP the use of advanced computational models is crucial to predict the cellular functional response through microdosimetry studies. <bold>Technology or Method: a multiphysic neuro-functionalized computational model has been built, using a realistic induced Neuronal Stem Cell (iNSC) model (a iNSC digital twin), to predict the effect of μsPEFs stimulation on both neuronal response and pore formation dynamics. <bold>Results: considering a 100-μsPEF and an intensity of 30 kV/m, the pore density can reach up to 1014 m−2 over the plasma membrane, with a consequent hyperpolarization and a phase shift of the neuronal firing. Whereas, where the pore density remains at its default value 109 m−2, the neuronal response is slightly affected in spikes frequency and shape, but still maintaining its firing functions. <bold>Conclusions: this study provides an innovative multiphysics implementation on a realist 2D iNSC model, that has demonstrated the 100-μsPEF influence on the neurodynamic response. <bold>Clinical or Biological Impact: the results obtained give powerful insights for further <italic>in vitro and <italic>in vivo experiments, that will validate the use of the device proposed within RISEUP for SCI regeneration.","PeriodicalId":29955,"journal":{"name":"IEEE Journal of Electromagnetics RF and Microwaves in Medicine and Biology","volume":"9 2","pages":"173-182"},"PeriodicalIF":3.0,"publicationDate":"2024-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144117316","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Size-Adaptive Occipital 18-Channel Receive-Only RF Coil for 3T MRI 尺寸自适应枕骨18通道仅接收射频线圈用于3T MRI

IF 3

IEEE Journal of Electromagnetics RF and Microwaves in Medicine and Biology Pub Date : 2024-10-08 DOI: 10.1109/JERM.2024.3465354

William Mathieu;Milica Popović;Reza Farivar

引用次数: 0

Microwave Imaging on S-Parameters Using FEM Thin-Wire Subcell Models 基于有限元细丝子单元模型的s参数微波成像

IF 3.2

IEEE Journal of Electromagnetics RF and Microwaves in Medicine and Biology Pub Date : 2024-10-07 DOI: 10.1109/JERM.2024.3468715

Lucas Banting;Joe LoVetri;Ian Jeffrey

引用次数: 0

Impact of Unit Cell Density on Grid and Stripe Metasurfaces for MRI Receive Enhancement 单元细胞密度对栅格和条纹超表面的影响

IF 3

IEEE Journal of Electromagnetics RF and Microwaves in Medicine and Biology Pub Date : 2024-09-23 DOI: 10.1109/JERM.2024.3458078

Robert Kowal;Lucas Knull;Ivan Vogt;Max Joris Hubmann;Daniel Düx;Bennet Hensen;Frank Wacker;Oliver Speck;Holger Maune

{"title":"Impact of Unit Cell Density on Grid and Stripe Metasurfaces for MRI Receive Enhancement","authors":"Robert Kowal;Lucas Knull;Ivan Vogt;Max Joris Hubmann;Daniel Düx;Bennet Hensen;Frank Wacker;Oliver Speck;Holger Maune","doi":"10.1109/JERM.2024.3458078","DOIUrl":"https://doi.org/10.1109/JERM.2024.3458078","url":null,"abstract":"Metasurfaces enable magnetic resonance imaging (MRI) without cables inside the bore by locally improving the sensitivity of scanner-integrated receive coils. This study systematically evaluates a novel grid design to provide signal enhancement for patient imaging. The potential of the proposed metasurface grid design was analyzed regarding its unit cell density and compared with stripe type metasurfaces. The effects were examined in-depth by numerical simulation, workbench measurements, and MRI experiments at 3 Tesla. Differences in the signal-to-noise ratio (SNR) using either the integrated body or spine coils were evaluated, as well as the influence of the metasurface orientation. The grid design provided a favorable eigenmode usable for MR imaging, where it has shown significantly less dependence on orientation, compared to stripe metasurfaces. With the densest grid, more than 26% higher SNR than its most spaced design was achieved. Combining the metasurface for imaging with the spine coil proved to be superior to the body coil. Applying the metasurface for knee imaging, the SNR was locally enhanced by more than 10-fold compared to the scan with only the spine coil. The high-density grid metasurfaces provided benefits compared to the multitude of designs evaluated. This work provides a comprehensive foundation for future developments of metasurfaces for MRI, whose advantages may be exploited e.g. in the domain of interventional radiology.","PeriodicalId":29955,"journal":{"name":"IEEE Journal of Electromagnetics RF and Microwaves in Medicine and Biology","volume":"9 2","pages":"198-205"},"PeriodicalIF":3.0,"publicationDate":"2024-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10685136","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144117319","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

Non-Contact Vital Sign Detection With High Noise and Clutter Immunity Based on Coherent Low-IF CW Radar 基于相干低中频连续波雷达的高噪声抗杂波非接触生命体征检测

IF 3

IEEE Journal of Electromagnetics RF and Microwaves in Medicine and Biology Pub Date : 2024-09-20 DOI: 10.1109/JERM.2024.3454332

Jingtao Liu;Fei Tong;Changzhan Gu

{"title":"Non-Contact Vital Sign Detection With High Noise and Clutter Immunity Based on Coherent Low-IF CW Radar","authors":"Jingtao Liu;Fei Tong;Changzhan Gu","doi":"10.1109/JERM.2024.3454332","DOIUrl":"https://doi.org/10.1109/JERM.2024.3454332","url":null,"abstract":"Non-contact vital sign detection using Continuous-Wave (CW) radar is subject to noises and clutters. The heterodyne architecture of the radar transceiver resolves the flicker noise. However, it still suffers from other noise components. Moreover, the presence of clutter also significantly introduces distortions in the sensing results. In this paper, an extended Noise-Immune Motion Sensing (ENIMS) technique is proposed to tackle the noise and clutters simultaneously in the low intermediate-frequency (IF) CW radar. It works by synthesizing <italic>I/Q signals at the IF peak of the spectra of the sequentially divided signal segments. Each segment generates one pair of <italic>I/Q data points and thus improves the signal-to-noise ratio (<italic>SNR). During this process, clutters are also converted into DC components of the <italic>I/Q signals. The circle-fitting-based DC compensation technique can thus be used to resolve the clutter issues. High-accurate displacement motion is then reconstructed with the DC-compensated <italic>I/Q signals. The theory and noise performance analysis are presented. Simulation and experiments show that, with the proposed technique, the <italic>SNR is improved by around 34 dB. Mechanical vibration as small as 90 <italic>μm and the subject person's breath and heartbeat at 3.2 m away from the 5. 8 GHz radar were detected under cluttered office environments with a small transmitting power of only 10 <italic>μW, whereas the conventional methods fail in the same cases.","PeriodicalId":29955,"journal":{"name":"IEEE Journal of Electromagnetics RF and Microwaves in Medicine and Biology","volume":"9 1","pages":"90-100"},"PeriodicalIF":3.0,"publicationDate":"2024-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143455299","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Development of Measurement Phantom for Absorbed Power Density Assessment by Human Exposure at 28 GHz Band 28ghz波段人体辐射吸收功率密度评估测量模体的研制

IF 3

IEEE Journal of Electromagnetics RF and Microwaves in Medicine and Biology Pub Date : 2024-09-18 DOI: 10.1109/JERM.2024.3419026

Daisuke Nishihara;Kensuke Sasaki;Rasyidah Hanan Binti Mohd Baharin;Tomoaki Nagaoka;Osamu Hashimoto;Ryosuke Suga

引用次数: 0

Enhanced Physics Modelling in Radar-Based Microwave Imaging for Breast Cancer Detection 基于雷达的微波成像乳腺癌检测的增强物理建模

IF 3

IEEE Journal of Electromagnetics RF and Microwaves in Medicine and Biology Pub Date : 2024-09-11 DOI: 10.1109/JERM.2024.3453994

Tyson Reimer;Spencer Christie;Illia Prykhodko;Stephen Pistorius

{"title":"Enhanced Physics Modelling in Radar-Based Microwave Imaging for Breast Cancer Detection","authors":"Tyson Reimer;Spencer Christie;Illia Prykhodko;Stephen Pistorius","doi":"10.1109/JERM.2024.3453994","DOIUrl":"https://doi.org/10.1109/JERM.2024.3453994","url":null,"abstract":"Microwave-based breast imaging (MBI) is an emerging modality that may serve as a screening tool due to the relatively large dielectric contrast between malignant and healthy tissues, the relatively low cost and small size of microwave hardware, and the favourable safety profile of non-ionizing microwave imaging. After more than two decades of research into MBI and several published clinical trials, challenges remain before the modality can be used clinically. Existing estimates of the diagnostic specificity are relatively low, between 20–65%. As a result of the limited specificity of the technique, existing radar-based image reconstruction algorithms have not demonstrated sufficient accuracy for breast cancer diagnosis. This article proposes using enhanced physics modelling (EPM) to improve the accuracy of the physics models used in image reconstruction to address the limited diagnostic accuracy. The results obtained in this study indicated that using EPM significantly improved the area under the curve (AUC) of the receiver operating characteristic curve. The AUC was improved from (84 <inline-formula><tex-math>$pm$</tex-math></inline-formula> 1)% to (92 <inline-formula><tex-math>$pm$</tex-math></inline-formula> 1)% through the use of EPM, demonstrating the potential of physics-informed radar-based image reconstruction in MBI.","PeriodicalId":29955,"journal":{"name":"IEEE Journal of Electromagnetics RF and Microwaves in Medicine and Biology","volume":"9 2","pages":"183-190"},"PeriodicalIF":3.0,"publicationDate":"2024-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144117268","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Programmable Pulse Generator by Envelope Detection for Implantable Medical Devices 可编程脉冲发生器的包络检测植入式医疗设备

IF 3

IEEE Journal of Electromagnetics RF and Microwaves in Medicine and Biology Pub Date : 2024-08-30 DOI: 10.1109/JERM.2024.3435075

Hao Zhang;Xiaozhou Zhou;Wenlong Zhou

引用次数: 0

Safeguarding Humans From Indoor Wireless Powering via Radar Detection 通过雷达探测保护人类免受室内无线供电

IF 3

IEEE Journal of Electromagnetics RF and Microwaves in Medicine and Biology Pub Date : 2024-08-29 DOI: 10.1109/JERM.2024.3447469

Pouya Mehrjouseresht;Oluwatosin J. Babarinde;Vladimir Volski;Alexander Ye. Svezhentsev;Dominique M. M.-P. Schreurs

{"title":"Safeguarding Humans From Indoor Wireless Powering via Radar Detection","authors":"Pouya Mehrjouseresht;Oluwatosin J. Babarinde;Vladimir Volski;Alexander Ye. Svezhentsev;Dominique M. M.-P. Schreurs","doi":"10.1109/JERM.2024.3447469","DOIUrl":"https://doi.org/10.1109/JERM.2024.3447469","url":null,"abstract":"Ensuring the safety of electromagnetic exposure stands as an important concern in wireless power transfer (WPT) systems. This work proposes a distributed Fusion Radar WPT (FRWPT) system designed to maintain safe Electric Field Amplitude (EFA) levels at specific locations detected by the radar, primarily where an individual is present. This approach allows for higher EFA in areas without the person, thus optimizing overall power utilization within the system. Also, the radar's ability to detect a person's velocity allows for projecting the person's upcoming location to ensure safety in advance. We introduce an algorithm including power weighting factors for controlling power to not only mitigate dangerous radiation but also maximize power utilization. One significant challenge is the estimation of EFA considering multipath propagation, a common issue in indoor environments. To overcome this, we explore the indoor EFA distribution and suggest a simulation-based method for EFA estimation, taking into account the amplifying effect of the human body on EFA. Experimental results demonstrate that the system successfully maintains EFA below a predefined threshold across various human locations. Moreover, these experiments highlight the system's capability to maximize power utilization ratio (PUR), achieving a value exceeding 50%.","PeriodicalId":29955,"journal":{"name":"IEEE Journal of Electromagnetics RF and Microwaves in Medicine and Biology","volume":"9 1","pages":"62-69"},"PeriodicalIF":3.0,"publicationDate":"2024-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143455301","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Propagation of Radio-Frequency Electromagnetic Fields Emitted by Surface-Mounted Parallel-Plate Couplers Along Human Limbs 表面安装平行板耦合器发射的射频电磁场沿人体四肢的传播

IF 3

IEEE Journal of Electromagnetics RF and Microwaves in Medicine and Biology Pub Date : 2024-08-29 DOI: 10.1109/JERM.2024.3442693

Arno Thielens

引用次数: 0