A compact and robust fabric antenna incorporated with metamaterials (MTM) at 2.4 GHz is introduced for wearable devices application where the MTM behaves as EBG/AMC. The benefit of introducing in a to diminish influence frequency detuning reduces backward radiation specifically when loaded on human body. overall size presented 60 × mm3. Furthermore, integrated design has capability controlling Specific absorption rate (SAR) improved bandwidth, front-to-back ratio (FBR), gain up 14.5%,...

In this article, a biosensor composed of single metamaterial asymmetric resonator is specifically designed for sensing the glucose level 1 µL solution. The has two gaps, and one them ends with semicircle shape on which solution placed. This design helps in confining drops solutions specific area where field maximally confined order to enhance electromagnetic wave-matter interaction. Six samples concentrations that cover hypoglycemia, normal hyperglycemia conditions vary from around 41 312...

ABSTRACT Magnetic resonance spectroscopy (MRS) provides a non‐invasive method for examining metabolic alterations associated with diseases. While 1 H‐based MRS is commonly employed, its effectiveness often limited by signal interference from water, reducing the accuracy of metabolite differentiation. In contrast, X‐nuclei leverages broader chemical shift dispersion non‐hydrogen nuclei to enhance ability distinguish between metabolites. This article presents design and analysis dual‐resonant...

A compact fabric antenna structure integrated with electromagnetic bandgap structures (EBGs) covering the desired frequency spectrum between 2.36 GHz and 2.40 for Medical Body-Area Networks (MBANs), is introduced. The needs of flexible system applications, preferably low-profile, compact, directive, robust to human body's loading effect have be satisfied. EBGs are attractive solutions such requirements provide efficient performance. In contrast earlier documented EBG backed designs, proposed...

A robust and low-profile electromagnetic band-gap (EBG) based on flexible wearable antenna covering 2.4 GHz frequency band is presented. The incorporated EBG with reduces the radiation into human body around 17 dB decreases impacts of detuning. overall dimension integrated 56 x 4 mm3 relative impedance bandwidth 8.3% achieved. proposed design has improved gain up to 7 dBi. Specific absorption rate (SAR) assessment also studied certify performance when it located proximity tissue....

This paper presents the first application of an EBG structure to improve B1 efficiency strip-line coils used for 7-Tesla Magnetic Resonance Imaging (MRI). The proposed offset multilayer electromagnetic band gap (EBG) is utilized as a high impedance surface behind extended half-wavelength (meandered) dipole. It operates at 300MHz, magnetic resonance frequency 7 T, and comprises electrically small cells only 7.5% free-space wavelength. reflection phase coefficient dispersion diagram were...

Diabetics need to keep track of their blood glucose level and measure it regularly determine insulin dose intake ensure that is always within the normal range. In this article, a system enables measurement non-invasively designed. This article uses near infra-red (NIR) transmittance spectroscopy, without drawing blood, puncturing skin, or causing pain. It involves light source detector circuits positioned on certain region body. The attenuated received signal by region. Data are collected...

In this article, a heterogeneous multimodal anthropomorphic breast phantom with carcinoma is introduced to meet the response of natural tissue when imaged using ionizing and non-ionizing machines. The skin, adipose, fibroglandular, pectoral muscle, were mimicked. A T1-weighted magnetic resonance image BI-RADS I segmentation was used for molds creation. tissue-mimicking materials (TMMs) tailored in terms their elemental composition weight fractions ionization radiation parameters. These are...

Summary The transmit/receive (T/R) switch is an important device in magnetic resonance imaging scanners whenever T/R radio frequency coils are intended to be used. It placed between transmit amplifiers and coils. adds loss the (RF) chain, reducing delivered power coil increasing noise figure of receive chain. Therefore, switches should designed for as low insertion possible. In addition, they need handle high transmit. this article, three 7‐Tesla using Eagle, validated by simulation (HFSS...

This article presents a transmit/receive switch that utilizes broadband microstripline hybrid coupler. The proposed is suitable for application in both 3T and 7T magnetic resonance imaging. It operates within three frequency ranges, covering well-known X-atomic nuclei, such as <sup>1</sup>H, <sup>13</sup>C, <sup>19</sup>F, <sup>23</sup>Na, <sup>31</sup>P, at field strengths. For the application, simultaneously covers corresponding...

In this article, the effects of tissues and geometric shape complexity human body head phantoms on performance radio frequency (RF) antennas/coils are investigated. The magnetic field, H, electric E, specific energy absorption rate a meander dipole RF coil calculated. has been designed fabricated at University laboratory to resonate operating 7 T resonance imaging machines. Three different geometries, homogeneous inhomogeneous, used in work. It was noticed that spherical phantom exhibited...

In this paper, an effective approach based on dielectric overlay is proposed to reduce the specific absorption rate SAR values of strip-line RF coils [2] for 7 Tesla magnetic resonance imaging MRI and avoid skin burn in ultra-high field MRI. Results show (40–12) % reduction when substrates (10.2–2) constants have been used.

<p>This article introduces a broadband microstripline-based transmit/receive switch for 7-Tesla magnetic resonance imaging. The designed aims to handle signal of multiple frequencies to/from multi-tuned radio-frequency coil that resonates at corresponding the speed precession wide range atomic X-nuclei, same time and without tuning. These include 1H, 23Na, 13C, 31P, 19F, 7Li used in spectroscopy as measure existence many diseases. fundamental third harmonic center are adjusted resonate...

In this article, we introduce coaxial cables to tune the resonant frequency of metamaterials, high impedance surfaces (HISs). The proposed structure is used as tuned artificial reflector for radio (RF) coils in magnetic resonance imaging (MRI) machines. technique, are connected pins (vias) HIS extend their lengths. Circulating current long paths aims increase total inductance shift its down frequency. method MRI solves problems using available tuning techniques, such inaccurate mechanical...

In this article, a compact transmitting/receiving switch is designed with concentric microstriplines on the top and bottom faces of coupler to handle RF signals to/from 1H 23Na coils working specifically at 7-Tesla magnetic resonance imaging machines. A pi-shaped equivalent circuit, from transmission line theory, has been used outer inner them in size. The using an electromagnetic wave simulator order transmit/receive specified frequencies that match same speeds precession atomic nuclei...

Breast cancer is one of the main reasons that lead to mortality, particularly in females. One factors help breast detection existence phantom with high similarity real associated utilized modality. Currently, existing phantoms are limited terms anatomy and ionization reactions properties. Thus, aim this paper design a heterogenous patient-based mimics tissues properties concerning ionizing imaging modalities. The includes skin tissue, fibroglandular adipose pectoral muscles, insertion...

Abstract This article introduces two new designs of transmit/receive switches for 7‐Tesla magnetic resonance imaging. Both based on a microstripline coupler technology. In the first design, different single frequency signals can be handled to/from radio coil using smart tuning network. second dual‐tuned 1H/23Na switch is designed to handle dual resonant signal coil, simultaneously and without tuning. transmit receive, design achieved good matching (‐20 dB), low insertion loss (0.78 dB) 1H,...