Adjustable Subwavelength Metasurface‐Inspired Resonator for Magnetic Resonance Imaging

Brui, Ekaterina; Shchelokova, Alena; Zubkov, Mikhail; Melchakova, Irina V.; Glybovski, Stanislav; Slobozhanyuk, Alexey P.

doi:10.1002/pssa.201700788

Cited by 25 publications

(10 citation statements)

References 40 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…An average enhancement factor was about two times. Other experiments include SNR improvement on in vivo imaging of a human wrist with a 1.5 T MRI system [114,115].…”

Section: Magnetic Resonance Imagingmentioning

confidence: 99%

Metasurfaces for biomedical applications: imaging and sensing from a nanophotonics perspective

et al. 2020

View full text Add to dashboard Cite

Metasurface is a recently developed nanophotonics concept to manipulate the properties of light by replacing conventional bulky optical components with ultrathin (more than 104 times thinner) flat optical components. Since the first demonstration of metasurfaces in 2011, they have attracted tremendous interest in the consumer optics and electronics industries. Recently, metasurface-empowered novel bioimaging and biosensing tools have emerged and been reported. Given the recent advances in metasurfaces in biomedical engineering, this review article covers the state of the art for this technology and provides a comprehensive interdisciplinary perspective on this field. The topics that we have covered include metasurfaces for chiral imaging, endoscopic optical coherence tomography, fluorescent imaging, super-resolution imaging, magnetic resonance imaging, quantitative phase imaging, sensing of antibodies, proteins, DNAs, cells, and cancer biomarkers. Future directions are discussed in twofold: application-specific biomedical metasurfaces and bioinspired metasurface devices. Perspectives on challenges and opportunities of metasurfaces, biophotonics, and translational biomedical devices are also provided. The objective of this review article is to inform and stimulate interdisciplinary research: firstly, by introducing the metasurface concept to the biomedical community; and secondly by assisting the metasurface community to understand the needs and realize the opportunities in the medical fields. In addition, this article provides two knowledge boxes describing the design process of a metasurface lens and the performance matrix of a biosensor, which serve as a “crash-course” introduction to those new to both fields.

show abstract

“…An average enhancement factor was about two times. Other experiments include SNR improvement on in vivo imaging of a human wrist with a 1.5 T MRI system [114,115].…”

Section: Magnetic Resonance Imagingmentioning

confidence: 99%

Metasurfaces for biomedical applications: imaging and sensing from a nanophotonics perspective

et al. 2020

View full text Add to dashboard Cite

show abstract

“…To meet the requirements, the proposed coil operates combining the principles of the surface wire resonator, i.e. a single periodic array of resonant coupled wires [16], [19] and the volume wire resonator composed of two separate periodic wire arrays with connected ends in the same structure [20]. In such resonators a number of hybridized eigenmodes can be excited [13].…”

Section: Rf-coil Design and Characterizationmentioning

confidence: 99%

Radio Frequency Coil for Dual-Nuclei MR Muscle Energetics Investigation Based on Two Capacitively Coupled Periodic Wire Arrays

Hurshkainen¹,

Dubois²,

Nikulin³

et al. 2020

Antennas Wirel. Propag. Lett.

View full text Add to dashboard Cite

In this paper, we describe a dedicated radiofrequency coil for magnetic resonance imaging and spectroscopy (MRSI) at 4.7 T optimized for investigation of muscle energetics in a human forearm. The coil operating at the Larmor frequencies of protons 1 H (200.1 MHz) and phosphorous 31 P (81 MHz) is based on two cylindrical periodic structures made of thin metal wires with tips interconnected through structural capacities of printed overlapping patches and sliding electric contacts. By independently exciting two orthogonal eigenmodes of the structure, the coil can be tuned and matched at both frequencies without lumped capacitors and cover the target region of interest for the forearm flexor muscles.

show abstract

“…In addition to the antenna configuration, the structural backscattered energy of the antenna depends on the airplane over which it is installed. [ 1–3 ] The practical techniques include cancellation of a wave coming into the radar or of the sensor‐based system by destructive interference with the scattered field. This is because there are no reflections from the feed in such a situation and backscattering of the antenna is due to its layout only or, to put it another way, the structural backscattered energy of the antenna depends on the currents induced by the incident wave above the surface of the antenna.…”

Section: Introductionmentioning

confidence: 99%

Coding Artificial Magnetic Conductor Ground and Their Application to High‐Gain, Wideband Radar Cross‐Section Reduction of a 2×2 Antenna Array

Saleem

Saifullah

2021

Physica Status Solidi (a)

View full text Add to dashboard Cite

A new technique is proposed for designing a low‐scattering 2 × 2 antenna array using strategic coding metasurface ground for wideband bistatic and monostatic backscattered energy level reduction. Two various artificial magnetic conductor (AMC) units cells are organized like a chessboard to obtain an effective 180° ± 37° reflection phase difference over a broadband frequency range. The low‐backscattering microstrip antenna array is achieved based on the destructive interference theory and diffusion property of AMC unit cells. Simulations show that the proposed antenna array has a considerable backscattering field level reduction of 4.7–18 GHz for both the x‐ and y‐polarization incident waves. It should also be noted that the maximum reduction of backscattered energy at a frequency of 7.2 GHz is −18 dB. The bistatic backscattering performance of the antenna is also given at different frequencies. Both a reference and a proposed prototype are fabricated, and the results are analyzed. Measurements of the fabricated prototype coincide well with simulations.

show abstract

Adjustable Subwavelength Metasurface‐Inspired Resonator for Magnetic Resonance Imaging

Cited by 25 publications

References 40 publications

Metasurfaces for biomedical applications: imaging and sensing from a nanophotonics perspective

Metasurfaces for biomedical applications: imaging and sensing from a nanophotonics perspective

Radio Frequency Coil for Dual-Nuclei MR Muscle Energetics Investigation Based on Two Capacitively Coupled Periodic Wire Arrays

Coding Artificial Magnetic Conductor Ground and Their Application to High‐Gain, Wideband Radar Cross‐Section Reduction of a 2×2 Antenna Array

Contact Info

Product

Resources

About