IEEE Journal of Electromagnetics RF and Microwaves in Medicine and Biology最新文献_第6页

Flexible, Stretchable, and MR-Invisible Dielectric Material for Magnetic Resonance Imaging 用于磁共振成像的柔性、可拉伸和不可见介电材料

IF 3.2

IEEE Journal of Electromagnetics RF and Microwaves in Medicine and Biology Pub Date : 2023-10-16 DOI: 10.1109/JERM.2023.3321873

Seyedamin Hashemi;Sri Kirthi Kandala;Benjamin Agbo;Zachary A. Colwell;Kwanjoon Song;Renxuan Xie;Sung-Min Sohn

{"title":"Flexible, Stretchable, and MR-Invisible Dielectric Material for Magnetic Resonance Imaging","authors":"Seyedamin Hashemi;Sri Kirthi Kandala;Benjamin Agbo;Zachary A. Colwell;Kwanjoon Song;Renxuan Xie;Sung-Min Sohn","doi":"10.1109/JERM.2023.3321873","DOIUrl":"10.1109/JERM.2023.3321873","url":null,"abstract":"Flexible, stretchable, and MR-invisible dielectric materials were studied to increase the local magnetic field (B\u00001\u0000) and signal-to-noise ratio (SNR) in magnetic resonance imaging. An electromagnetic simulation was performed with different dielectric constants and physical structures to measure the effects on the magnetic field (H) distribution and the specific absorption rate (SAR). After flexible and stretchable dielectric pads composed of silicon carbide (SiC)- and barium titanate (BaTiO\u00003\u0000)-based polymer mixtures were fabricated, MR imaging tests with two isotropic phantoms and an oxtail sample were performed in a preclinical 7 T scanner (BioSpec scanner, Bruker). The B\u00001\u0000 field intensities and SNR were compared with a reference image. Also, additional noise and image artifacts were evaluated. Simulation results show that wrapping an object with a dielectric material is the most effective method to increase the intensity and uniformity of the H field. The results of MR imaging consistently show a higher B\u00001\u0000 field intensity and SNR when utilizing dielectric materials. An improvement of 25.78% and 18.27% in SNR was observed when SiC- and BaTiO\u00003\u0000-based dielectric pads were wrapped around an oxtail, respectively. In this work, the first stretchable dielectric materials with MR-invisibility were developed, and their performance was demonstrated with 7 T MR imaging.","PeriodicalId":29955,"journal":{"name":"IEEE Journal of Electromagnetics RF and Microwaves in Medicine and Biology","volume":null,"pages":null},"PeriodicalIF":3.2,"publicationDate":"2023-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136374014","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

Complex Permittivity Reconstruction Using Skin Surface Reflection and Neural Network for Microwave Breast Imaging 基于皮肤表面反射和神经网络的微波乳房成像复介电常数重建

IF 3.2

IEEE Journal of Electromagnetics RF and Microwaves in Medicine and Biology Pub Date : 2023-10-16 DOI: 10.1109/JERM.2023.3321423

Peixian Zhu;Shouhei Kidera

引用次数: 0

A Wireless Joint Communication and Localization EMG-Sensing Concept for Movement Disorder Assessment 一种用于运动障碍评估的无线联合通信和定位肌电传感概念

IF 3.2

IEEE Journal of Electromagnetics RF and Microwaves in Medicine and Biology Pub Date : 2023-10-16 DOI: 10.1109/JERM.2023.3321974

Stefan Brückner;Jasmin Kolpak;Fabian Michler;Nikita Shanin;Robert Schober;Amelie Hagelauer;Robert Weigel;Heiko Gaßner;Jürgen Winkler;Björn M. Eskofier;Martin Vossiek

{"title":"A Wireless Joint Communication and Localization EMG-Sensing Concept for Movement Disorder Assessment","authors":"Stefan Brückner;Jasmin Kolpak;Fabian Michler;Nikita Shanin;Robert Schober;Amelie Hagelauer;Robert Weigel;Heiko Gaßner;Jürgen Winkler;Björn M. Eskofier;Martin Vossiek","doi":"10.1109/JERM.2023.3321974","DOIUrl":"10.1109/JERM.2023.3321974","url":null,"abstract":"Real-time sensory recording of the musculoskeletal system function is an important tool for the diagnosis, treatment planning, and optimal treatment execution of diseases, such as Parkinson's disease and osteoarthritis. This article presents a new wireless joint communication and localization electromyography (EMG)-sensing concept. An on-body sensor beacon measures EMG signals and wirelessly transmits them. At the same time, the spatial position and movement of the beacon is determined with high precision in real time using these transmitted radio signals. The seamless integration of multiple sensors avoids the need to synchronize and individually set up multiple independently operating sensors. An outstanding feature of the radio localization approach is that it does not require proprietary ultra-wideband signals or complicated time synchronization protocols, allowing for small and energy-efficient implementation. To demonstrate this novel concept, a wireless 3D-localizable EMG sensor was developed and experimentally evaluated. This new type of sensing concept allows, for the first time, the time-synchronous measurement of muscle activity and the underlying movement of the associated body part.","PeriodicalId":29955,"journal":{"name":"IEEE Journal of Electromagnetics RF and Microwaves in Medicine and Biology","volume":null,"pages":null},"PeriodicalIF":3.2,"publicationDate":"2023-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10286030","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136373276","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

Heart Rate Variability-Based Obstructive Sleep Apnea Events Classification Using Microwave Doppler Radar 基于心率变异性的阻塞性睡眠呼吸暂停事件微波多普勒雷达分类

IF 3.2

IEEE Journal of Electromagnetics RF and Microwaves in Medicine and Biology Pub Date : 2023-09-27 DOI: 10.1109/JERM.2023.3317304

Syed Doha Uddin;Md. Shafkat Hossain;Shekh M. M. Islam;Victor Lubecke

{"title":"Heart Rate Variability-Based Obstructive Sleep Apnea Events Classification Using Microwave Doppler Radar","authors":"Syed Doha Uddin;Md. Shafkat Hossain;Shekh M. M. Islam;Victor Lubecke","doi":"10.1109/JERM.2023.3317304","DOIUrl":"10.1109/JERM.2023.3317304","url":null,"abstract":"Obstructive Sleep Apnea (OSA) is the most common type of sleep disorder that consists of multiple episodes of partial or complete closure (apnea, hypopnea) of the upper airway during sleep and underdiagnosed problems as there is no reliable portable in-home sleep monitoring system. Doppler radar system is gaining attention as an in-home sleep monitoring system due to its non-contact and unobtrusive form of measurement. Prior research on Radar-based sleep monitoring systems mostly focused on distinguishing apnea and normal breathing patterns using radar-reflected signal amplitude that can't distinguish accurately apnea and hypopnea events. Apnea and hypopnea events were distinguished using effective radar cross-section (ERCS) for short-scale study and ERCS changes with sleeping postures and so on. In this work, we proposed a heart rate variability-based robust feature extraction technique to distinguish different sleep disorder events such as apnea, hypopnea, and normal breathing. HRV-based feature extraction technique was employed on ten consented OSA participants' clinical studies to find a distinguishable feature known as the power of the low-frequency band (0.04-0.15 Hz) and high-frequency band (HF) (0.15-0.4 Hz). The extracted hyper-feature (HF and LF) was then integrated with the traditional Machine learning classifiers (ML) including k-nearest neighbors (KNN), support vector machine (SVM), and random forest. SVM outperformed other classifiers with an accuracy of 97% for distinguishing different OSA events that also supersedes other reported results (ERCS). The proposed method has several potential applications including in-home sleep monitoring, OSA severity detection, respiratory disorder detection, and so on.","PeriodicalId":29955,"journal":{"name":"IEEE Journal of Electromagnetics RF and Microwaves in Medicine and Biology","volume":null,"pages":null},"PeriodicalIF":3.2,"publicationDate":"2023-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135794999","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

Clothing Effect on Multilayered Skin Model Exposure From 20 GHz to 100 GHz 服装对多层皮肤模型暴露的影响从20 GHz到100 GHz

IF 3.2

IEEE Journal of Electromagnetics RF and Microwaves in Medicine and Biology Pub Date : 2023-09-06 DOI: 10.1109/JERM.2023.3309935

Kun Li;Kensuke Sasaki;Giulia Sacco;Maxim Zhadobov

{"title":"Clothing Effect on Multilayered Skin Model Exposure From 20 GHz to 100 GHz","authors":"Kun Li;Kensuke Sasaki;Giulia Sacco;Maxim Zhadobov","doi":"10.1109/JERM.2023.3309935","DOIUrl":"10.1109/JERM.2023.3309935","url":null,"abstract":"This study presents a statistical assessment of clothed human skin model exposure from 20 to 100 GHz. Dielectric property data for two typical textile materials, i.e., cotton and wool, were provided for the first time over the entire frequency range. A statistical analysis of the ratio of absorbed power density (APD) to skin temperature elevation was performed by Monte Carlo simulations using a multi-layer skin model with a textile layer. Three key parameters, namely the angle of incidence, cross-polarization power ratio (\u0000<inline-formula><tex-math>$bm {XPR}$</tex-math></inline-formula>\u0000), and air gap spacing between cloth and skin surface, were considered in the dosimetry analysis. The results show that at an incidence angle up to 60\u0000<inline-formula><tex-math>$^circ$</tex-math></inline-formula>\u0000, fluctuations of the ratio are observed by varying \u0000<inline-formula><tex-math>$bm {XPR}$</tex-math></inline-formula>\u0000 from \u0000<inline-formula><tex-math>$-$</tex-math></inline-formula>\u000050 to 50 dB. In the 20–100 GHz range, when the \u0000<inline-formula><tex-math>$bm {XPR}$</tex-math></inline-formula>\u0000 is less than 0 dB, i.e., horizontally polarized wave is dominant, the impact on the ratio caused by either the incident angle or the air gap spacing is marginal. The deviation is increased when \u0000<inline-formula><tex-math>$bm {XPR}$</tex-math></inline-formula>\u0000 exceeds 0 dB, i.e., vertically polarized wave is dominant, especially above 60 GHz at the incidence angles above 60\u0000<inline-formula><tex-math>$^circ$</tex-math></inline-formula>\u0000.","PeriodicalId":29955,"journal":{"name":"IEEE Journal of Electromagnetics RF and Microwaves in Medicine and Biology","volume":null,"pages":null},"PeriodicalIF":3.2,"publicationDate":"2023-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90563003","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

On the Feasibility of a High-Sensitivity Imaging System for Biomedical Applications Based on Low-Frequency Magnetic Field 基于低频磁场的生物医学高灵敏度成像系统的可行性研究

IF 3.2

IEEE Journal of Electromagnetics RF and Microwaves in Medicine and Biology Pub Date : 2023-08-31 DOI: 10.1109/JERM.2023.3308377

Sabrina Rotundo;Danilo Brizi;Agostino Monorchio

{"title":"On the Feasibility of a High-Sensitivity Imaging System for Biomedical Applications Based on Low-Frequency Magnetic Field","authors":"Sabrina Rotundo;Danilo Brizi;Agostino Monorchio","doi":"10.1109/JERM.2023.3308377","DOIUrl":"10.1109/JERM.2023.3308377","url":null,"abstract":"In this article, the theoretical and experimental feasibility analyses of a high-sensitivity imaging system for non-invasive detection of pathological inclusions within biological tissues are presented. The radiating system, exploiting a low frequency magnetic field operating at 3 MHz, consists of an inner resonant spiral sensor, inductively coupled to an unloaded external planar probe loop. The proposed configuration produces a focused magnetic field distribution, therefore a high-sensitivity imaging with respect to the wavelength can be accomplished (detecting inclusions with size in the order of λ/10000, i.e., 1 cm). In particular, the inclusion detection is carried out by observing the amplitude shift of the external probe loop input impedance while scanning the region of interest, leading to a non-invasive and contactless imaging procedure. In addition, we demonstrate the possibility to detect an inclusion, placed within the investigated tissue, either with or without the use of a ferromagnetic contrast medium. To evaluate the proposed imaging system effectiveness, we first perform full-wave numerical simulations. Then, we report the experimental measurements acquired over a fabricated prototype interacting with a representative biological phantom, observing a very good agreement with the numerical simulations. The results confirm the potential for an innovative near-field imaging system to be employed for non-invasive detection of malignant inclusions, expanding the adoption of low RF frequencies in biomedical applications.","PeriodicalId":29955,"journal":{"name":"IEEE Journal of Electromagnetics RF and Microwaves in Medicine and Biology","volume":null,"pages":null},"PeriodicalIF":3.2,"publicationDate":"2023-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10236580","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77030470","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

Miniaturized 434 MHz Cavity Encapsulated Patch Antenna for Superficial Hyperthermia Treatment 用于表面热疗治疗的小型化434mhz腔封装贴片天线

IF 3.2

IEEE Journal of Electromagnetics RF and Microwaves in Medicine and Biology Pub Date : 2023-08-29 DOI: 10.1109/JERM.2023.3307220

Muthu Rattina Subash Ramu;Kavitha Arunachalam

{"title":"Miniaturized 434 MHz Cavity Encapsulated Patch Antenna for Superficial Hyperthermia Treatment","authors":"Muthu Rattina Subash Ramu;Kavitha Arunachalam","doi":"10.1109/JERM.2023.3307220","DOIUrl":"10.1109/JERM.2023.3307220","url":null,"abstract":"A 434 MHz patch antenna encapsulated in a planar metal cavity is reported for hyperthermia (HT) treatment of superficial cancers. The optimized patch antenna is 3.6 cm $ times$ 3.6 cm with return loss > 20 dB, ―10 dB bandwidth of 14 MHz, and predominantly tangential electric field in the near field at 434 MHz. Antenna effective field size (EFS) and penetration depth observed from simulation are 17.22 cm2 and 1.26 cm, respectively. The antenna optimized using bulk body tissue was assessed on heterogeneous human body model followed by experimental verification on tissue-mimicking phantom and ex-vivo bovine tissues. Thermal EFS (TEFS) and thermal effective penetration depth (TEPD) of 20.92 cm2 and 2.05 cm measured in tissue phantoms are comparable to 18.61 cm2 and 2.19 cm determined in simulations. Experiments on homogeneous tissue phantom and heterogeneous ex-vivo bovine tissues show localized power deposition in agreement with the simulations. The metal encapsulated patch antenna with EFS to aperture area ratio of 1.33 is well suited for HT treatment of localized superficial cancer. It is also concluded that it could be used for designing planar array capable of delivering adjustable heating pattern to treat large area diffused superficial cancers.","PeriodicalId":29955,"journal":{"name":"IEEE Journal of Electromagnetics RF and Microwaves in Medicine and Biology","volume":null,"pages":null},"PeriodicalIF":3.2,"publicationDate":"2023-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77017011","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

IEEE Journal of Electromagnetics, RF and Microwaves in Medicine and Biology Publication Information IEEE医学和生物学中的电磁学、RF和微波杂志出版信息

IF 3.2

IEEE Journal of Electromagnetics RF and Microwaves in Medicine and Biology Pub Date : 2023-08-22 DOI: 10.1109/JERM.2023.3302662

引用次数: 0

IEEE Journal of Electromagnetics, RF, and Microwaves in Medicine and Biology About this Journal IEEE医学和生物学中的电磁学、RF和微波杂志关于该杂志

IF 3.2

IEEE Journal of Electromagnetics RF and Microwaves in Medicine and Biology Pub Date : 2023-08-22 DOI: 10.1109/JERM.2023.3302666

引用次数: 0

Dual Band Coaxial Y-Monopole for Hyperthermia Treatment of Cervical Cancer Delivered Through an Intrauterine Tandem 双波段同轴y单极子通过宫内串联输送热疗治疗宫颈癌

IF 3.2

IEEE Journal of Electromagnetics RF and Microwaves in Medicine and Biology Pub Date : 2023-08-21 DOI: 10.1109/JERM.2023.3304547

Shabeeb Ahamed KP;Joseph Prashanth Britto;Kavitha Arunachalam

{"title":"Dual Band Coaxial Y-Monopole for Hyperthermia Treatment of Cervical Cancer Delivered Through an Intrauterine Tandem","authors":"Shabeeb Ahamed KP;Joseph Prashanth Britto;Kavitha Arunachalam","doi":"10.1109/JERM.2023.3304547","DOIUrl":"10.1109/JERM.2023.3304547","url":null,"abstract":"In this work, we report a coaxial antenna consisting of a flexible Y-monopole with dual-band operation and low-profile wideband flexible ferrite choke for delivering localized HT treatment at shallow insertion depth of 50 mm inside the cervix using custom fabricated non-metallic intrauterine cervix tandem of 8 mm outer diameter and 1 mm wall thickness. Variable treatment coverage was achieved by selecting the excitation of the dual-band Y-monopole as 915 and 1300 MHz. The Y-monopole is a coaxial wire with a Y-split in the exposed inner conductor and wideband flexible ferrite sheet on the outer conductor to suppress the secondary current. The water loaded Y-monopole inside the intrauterine tandem cervix applicator with 15° bend angle resonated at 915 and 1300 MHz for arm lengths of 21 and 13.5 mm, respectively. The heating characteristics of Y-monopole was assessed using tissue-mimicking phantoms. Phantom measurements indicate dual band operation with power reflection coefficient \u0000<inline-formula><tex-math>$ leq -$</tex-math></inline-formula>\u0000 24 dB at 915 and 1300 MHz. The measured extents of 25% axial specific absorption rate in tissue phantom at 915 and 1300 MHz is 39.4 and 28.4 mm, respectively. Localized power deposition with \u0000<inline-formula><tex-math>$Delta T = 3$</tex-math></inline-formula>\u0000 °C iso-contour of 46.3 mm × 39.2 mm and 37 mm × 31 mm along axial and radial directions was measured at 915 and 1300 MHz, respectively. Phantom measurements demonstrate the ability of the proposed antenna to deliver variable treatment volume to the cervix through 15° intrauterine tandem.","PeriodicalId":29955,"journal":{"name":"IEEE Journal of Electromagnetics RF and Microwaves in Medicine and Biology","volume":null,"pages":null},"PeriodicalIF":3.2,"publicationDate":"2023-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76762659","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