Advancements in non-invasive microwave brain stimulation: A comprehensive survey

Physics of Life Reviews, Год журнала: 2024, Номер 48, С. 132 - 161

Опубликована: Янв. 9, 2024

Язык: Английский

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Advances in magnetic induction hyperthermia

Frontiers in Bioengineering and Biotechnology, Год журнала: 2024, Номер 12

Опубликована: Авг. 5, 2024

Magnetic induction hyperthermia (MIH), is a technique that has developed rapidly in recent years the field of tumor thermotherapy. It implants magnetic heating medium (millimeter-sized heat seeds, micron-sized particles and nanometer-sized fluids, etc.) inside tumor. The material heats up under an external alternating (100-500 kHz), which causes high temperature zone to form local biological tissues induces apoptosis cells. advantages safety, strong targeting, repeatable treatment, size incision during treatment negligible compared surgical resection, currently used clinical treatment. However, millimeter-scale seed typically treatments can result uneven temperatures within tissue. Common MIH devices are bulky complex design, not easy for medical staff get their hands on, issues limit diffusion MIH. In this view, paper will discuss basic theoretical research on progress MIH-related technologies, with focus latest development results hotspots nanoscale ferromagnetic media therapy devices, as well validation therapeutic efficacy new technology animal experiments trials. paper, it found using nanoparticles improves uniformity field, magneto-thermal properties materials significantly improved. device was miniaturized simplify operation steps, while focusing locally enhanced. there fewer studies biotoxicity aspects nanomedicines, localized safety after irradiation human body have been sufficiently discussed. Ultimately, purpose advance related thermotherapy be applied

Язык: Английский

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Comparative analysis of energy transfer mechanisms for neural implants

Frontiers in Neuroscience, Год журнала: 2024, Номер 17

Опубликована: Янв. 16, 2024

As neural implant technologies advance rapidly, a nuanced understanding of their powering mechanisms becomes indispensable, especially given the long-term biocompatibility risks like oxidative stress and inflammation, which can be aggravated by recurrent surgeries, including battery replacements. This review delves into comprehensive analysis, starting with considerations for both energy storage units transfer methods. The focuses on four main implants: Electromagnetic, Acoustic, Optical, Direct Connection to Body. Among these, Electromagnetic Methods include techniques such as Near-Field Communication (RF). Acoustic methods using high-frequency ultrasound offer advantages in power transmission efficiency multi-node interrogation capabilities. Optical methods, although still early development, show promising efficiencies Near-Infrared (NIR) light while avoiding electromagnetic interference. connections, efficient, pose substantial safety risks, infection micromotion disturbances within tissue. employs key metrics specific absorption rate (SAR) evaluation these It also discusses recent innovations Sectored-Multi Ring Ultrasonic Transducer (S-MRUT), Stentrode, Neural Dust. Ultimately, this aims help researchers, clinicians, engineers better understand challenges potentially create new solutions implants.

Язык: Английский

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Complementary Split-Ring Resonator for Non-Invasive Diagnosis of Carotid Artery Atherosclerosis: Towards Future In-Vivo Measurements

IRBM, Год журнала: 2025, Номер unknown, С. 100883 - 100883

Опубликована: Фев. 1, 2025

Язык: Английский

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Implantable F-shaped antenna with 93.32 Mbps speed for Intra-body communications

Frequenz, Год журнала: 2025, Номер unknown

Опубликована: Март 18, 2025

Abstract The on-body and implanted antenna’s communication is examined in this work. Short-range occurs within the human body during kind of communication, which sometimes referred to as intra-body (IBC). With antenna compatibility, an implantable F-shaped made for communication. effectiveness was assessed using SAR analysis, radiation properties, reflection coefficient, biocompatibility. A correlation between transmitted signal from received determined, together with fidelity factor group latency. Furthermore, link margin established, allows high-speed data transfer at 93.32 Mbps a 40 cm distance 20 dB wearable antenna. gain −24.8 dBi, muscle layer’s impedance bandwidth 24.7 % (2.31–2.79 GHz). In order account health concerns, specific absorption rate (SAR) determined. outcome fell IEEE International Commission on Non-ionizing Radiation Protection’s standard bounds (ICNRP). phantom skin-mimicking gel used test suggested There strong simulated measured data.

Язык: Английский

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High fidelity factor compact Vivaldi antenna with irregular slots for breast cancer detection

Electromagnetics, Год журнала: 2025, Номер unknown, С. 1 - 23

Опубликована: Март 26, 2025

Язык: Английский

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Respiration and Heart Rate Monitoring in Smart Homes: An Angular-Free Approach with an FMCW Radar

Sensors, Год журнала: 2024, Номер 24(8), С. 2448 - 2448

Опубликована: Апрель 11, 2024

This paper proposes a new approach for wide angle monitoring of vital signs in smart home applications. The person is tracked using an indoor radar. Upon detecting the to be static, radar automatically focuses its beam on that location, and subsequently breathing heart rates are extracted from reflected signals continuous wavelet transform (CWT) analysis. In this way, leveraging radar’s on-chip processor enables real-time across varying angles. our experiment, we employ commercial multi-input multi-output (MIMO) millimeter-wave FMCW monitor within range 1.15 2.3 m angular span −44.8 +44.8 deg. Bland–Altman plot, measured results indicate average difference −1.5 0.06 beats per minute (BPM) relative reference rate rate, respectively.

Язык: Английский

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Reconfigurable Multimode Microwave Sensor With Resonance and Transmission Sensing Capabilities for Noninvasive Glucose Monitoring

IEEE Transactions on Microwave Theory and Techniques, Год журнала: 2023, Номер 72(5), С. 3102 - 3117

Опубликована: Окт. 20, 2023

This article proposes a novel reconfigurable multimode microwave sensor integrating with resonance-and transmission-sensing capabilities for real-time noninvasive glucose monitoring. The is initiated by utilizing dynamic controllable spoof surface plasmon polariton (SSPP) transmission line (TL) and array resonator based on localized (SLSP). possesses multiple resonance modes high Q-factors, its working characteristic can be flexibly manipulated tuning the bias voltage applied to loaded varactor diodes. Glucose monitoring accomplished analyzing changes in shift of frequencies amplitude coefficient within specific operating band. Furthermore, an effective joint sensing method developed combining results obtained from different various characteristics sensor, which greatly enhance sensitivity ability correct errors. experimental demonstrate that, valuable concentration range 0–800 mg/dL, presented realizes 9.86 $\times$ 10 notation="LaTeX">$^{\mathbf{-2}}$ MHz/(mg/dL) 2.00 dB/(mg/dL) sensing. Also, exhibit ultrahigh linear correlation, enabling possess robust crosschecking capability. Moreover, that this has strong error correction function.

Язык: Английский

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A Tuned Microwave Resonant Sensor for Skin Cancerous Tumor Diagnosis

IEEE Journal of Electromagnetics RF and Microwaves in Medicine and Biology, Год журнала: 2023, Номер 7(4), С. 320 - 327

Опубликована: Июнь 7, 2023

In this work, a planar microwave sensor based on flexible polyimide substrate has been developed to distinguish if skin lesion is malignant or benign. The tuned loop resonator operating in the industrial, scientific, and medical (ISM) band at 2.465 GHz, providing localized high-intensity electric field that penetrates into tissues with sufficient spatial spectral resolutions. radius of 5.4 mm was by concentric metal pad desired resonant frequency sufficiently high quality factor 98.7 reflection coefficient $-$ 63.98 dB. detection electromagnetic resonance change sequential shift susceptible dielectric property difference between cancerous benign tissues. Basal Cell Carcinoma (BCC) Seborrheic Keratosis (SK), most commonly found lesions close visual similarities, were selected demonstrate sensing concept. Tissue-mimicking materials fabricated have similar properties those healthy skin, SK, BCC literature. Simulations measurements conducted. Significant shifts 759 MHz 415 observed SK phantoms simulations measurements, respectively, when size tumor phantom cuboid 12 × 4 underneath among skin. conducted for different side lengths from 2 16 while thickness remained mm. Malignant could be distinguished length as small Corresponding 6, 8, 10, matched trend well simulation results. promising results validate principle, showing great potential cancer noninvasive, efficient, lower-cost way.

Язык: Английский

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Radar-Based Continuous Human Activity Recognition with Multi-Label Classification

IEEE Sensors, Год журнала: 2023, Номер unknown, С. 1 - 4

Опубликована: Окт. 29, 2023

This paper presents a novel approach to radar-based human activity recognition in continuous data streams. To date, most work this research area has aimed at either classifying every single time step separately by means of recurrent neural networks, or using two-step procedure first segmenting the stream into activities and then segment. The is restricted time-dependent as input; second depends crucially on segmentation step. overcome these issues we propose new which segment windows fixed length subsequently classify each Since due length, not one alone, use multi-label classification approach, can account for multiple taking place same giving outputs. obtain higher accuracy fuse several radar representations, namely range-time, range-Doppler spectrogram. Using publicly available dataset, an overall 95.8% F1 score 92.08% could be achieved with proposed method.

Язык: Английский

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