Imaging Capabilities of the ¹H-X-Nucleus Metamaterial-Inspired Multinuclear RF-Coil

Puchnin, Viktor; Ivanov, Viacheslav; Gulyaev, Mikhail V.; Pirogov, Y.A.; Zubkov, Mikhail

doi:10.1109/tmi.2022.3143693

Cited by 4 publications

(1 citation statement)

References 42 publications

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“…The use of such a coil, able to provide high signal intensities, also permitted access to patients in the prone position. Recently, Puchnin et al [12,13] proposed a twocoil transmitter/receiver setup for small animal MR imaging at 7 T constituted by a 1 H rectangular BC, implemented on a PCB substrate, and a non-resonant loop antenna with a metamaterial-inspired resonator that can be tuned over a wide frequency range for 1 H, 31 P, 23 Na, and 13 C nuclei. A 15 MHz-tuned 7 cm diameter BC was used in a standalone surface MRI system for skin imaging, specifically designed for dermatologic investigation to depths of 1 cm.…”

Section: Introductionmentioning

confidence: 99%

Biot–Savart-Based Design and Workbench Validation at 100 MHz of Transverse Field Surface RF Coils

2023

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Radiofrequency (RF) surface coils are extensively used as receivers in magnetic resonance imaging (MRI) and magnetic resonance spectroscopy (MRS) systems thanks to their high signal-to-noise ratio (SNR). For specific magnetic resonance applications, the design of dedicated RF surface coils with a transverse (to the coil’s plane) RF magnetic field pattern can be necessary. Such transverse-field RF coils are constituted by several central linear (parallel or crossing) conductor elements connected by return current paths. Typically, the outer shape of such RF coils is circular or squared, although other geometries can be used. This paper describes the implementation and validation of a transverse-field RF surface coil simulator based on magnetostatic analysis, which permits the design and optimization of square butterfly and figure-of-eight RF coils with adjustable size and mutual distance between the central linear current elements. The simulation results, compared with the ones provided by a standard square loop RF coil, were validated with 100 MHz workbench measurements performed on three home-built prototypes. Finally, two novel quadrature RF coil structures designed by overlapping two orthogonal square butterfly and figure-of-eight RF coils were simulated and theoretically characterized. The RF coils described here should be suitable for a wide range of MRI/MRS preclinical/clinical applications, mainly at fields below 3 T.

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Section: Introductionmentioning

confidence: 99%

Biot–Savart-Based Design and Workbench Validation at 100 MHz of Transverse Field Surface RF Coils

2023

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Metamaterial‐Enabled Hybrid Receive Coil for Enhanced Magnetic Resonance Imaging Capabilities

Zhu,

Wu,

Anderson

et al. 2024

Advanced Science

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Magnetic resonance imaging (MRI) relies on high‐performance receive coils to achieve optimal signal‐to‐noise ratio (SNR), but conventional designs are often bulky and complex. Recent advancements in metamaterial technology have led to the development of metamaterial‐inspired receive coils that enhance imaging capabilities and offer design flexibility. However, these configurations typically face challenges related to reduced adaptability and increased physical footprint. This study introduces a hybrid receive coil design that integrates an array of capacitively‐loaded ring resonators directly onto the same plane as the coil, preserving its 2D layout without increasing its size. Both the coil and metamaterial are individually non‐resonant at the targeted Larmor frequency, but their mutual coupling induces a resonance shift, achieving a frequency match and forming a hybrid structure with enhanced SNR. Experimental validation on a 3.0 T MRI platform shows that this design allows for adjustable trade‐offs between peak SNR and penetration depth, making it adaptable for various clinical imaging scenarios.

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Angularly Stable High-Q Factor Metamaterial Absorber for Biomedical Sensing Applications

Dewangan,

Mishra,

Ghosh

2024

IEEE Sens. Lett.

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Imaging Capabilities of the ¹H-X-Nucleus Metamaterial-Inspired Multinuclear RF-Coil

Cited by 4 publications

References 42 publications

Biot–Savart-Based Design and Workbench Validation at 100 MHz of Transverse Field Surface RF Coils

Biot–Savart-Based Design and Workbench Validation at 100 MHz of Transverse Field Surface RF Coils

Metamaterial‐Enabled Hybrid Receive Coil for Enhanced Magnetic Resonance Imaging Capabilities

Angularly Stable High-Q Factor Metamaterial Absorber for Biomedical Sensing Applications

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