ArticleMagnetic resonance in medicine2018
Improvements of transmit efficiency and receive sensitivity with ultrahigh dielectric constant (uHDC) ceramics at 1.5 T and 3 T.
Article in Magnetic resonance in medicine, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 20 papers.
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Who cites it
20 citing papers in PubMed.
- Enhancing SNR in MRI at 7T using wearable coils, dielectric resonators, and dipole antennas.Magma (New York, N.Y.) · 2026Article
- Improving Image Quality and Decreasing SAR With High Dielectric Constant Pads in 3 T Fetal MRI.Journal of magnetic resonance imaging : JMRI · 2025Article
- Discretely Dielectric-Material Coated Dipole Antenna: Enhanced Tuning and Electric Field Reduction for Safety at 300 MHz.Proceedings of the International Society for Magnetic Resonance in Medicine ... Scientific Meeting and Exhibition. International Society for Magnetic Resonance in Medicine. Scientific Meeting and Exhibition · 2025Article
- Large improvement in RF magnetic fields and imaging SNR with whole-head high-permittivity slurry helmet for human-brain MRI applications at 7 T.Magnetic resonance in medicine · 2025Article
- In vivoMagnetic resonance in medicine · 2024Article
- A numerical investigation of meander and solenoidal dipole antenna array configurations for 7T MR applications.Proceedings of the International Society for Magnetic Resonance in Medicine ... Scientific Meeting and Exhibition. International Society for Magnetic Resonance in Medicine. Scientific Meeting and Exhibition · 2024Article
- Article
- Performance and B1 Efficiency Analysis of Different Dipole Antenna Types at 7T.Proceedings of the International Society for Magnetic Resonance in Medicine ... Scientific Meeting and Exhibition. International Society for Magnetic Resonance in Medicine. Scientific Meeting and Exhibition · 2023Article
- A Systematic Comparison of Different Dipole Antenna Array Configurations for Knee Imaging Applications at 7T.Proceedings of the International Society for Magnetic Resonance in Medicine ... Scientific Meeting and Exhibition. International Society for Magnetic Resonance in Medicine. Scientific Meeting and Exhibition · 2023Article
- Novel materials in magnetic resonance imaging: high permittivity ceramics, metamaterials, metasurfaces and artificial dielectrics.Magma (New York, N.Y.) · 2022Review
- B1 field flattening and length control of half-wave dipole antenna with discrete dielectric coating.Proceedings of the International Society for Magnetic Resonance in Medicine ... Scientific Meeting and Exhibition. International Society for Magnetic Resonance in Medicine. Scientific Meeting and Exhibition · 2022Article
- A Dielectric Material Coated Half-Wave Dipole antenna for Ultrahigh Field MRI at 7T/300MHz.Proceedings of the International Society for Magnetic Resonance in Medicine ... Scientific Meeting and Exhibition. International Society for Magnetic Resonance in Medicine. Scientific Meeting and Exhibition · 2022Article
- Displacement current distribution on a high dielectric constant helmet and its effect on RF field at 10.5 T (447 MHz).Magnetic resonance in medicine · 2021Article
- Improved whole-brain SNR with an integrated high-permittivity material in a head array at 7T.Magnetic resonance in medicine · 2021Article
- Design of an Intraoral Dipole Antenna for Dental Applications.IEEE transactions on bio-medical engineering · 2021Article
- Tunable Ultrahigh Dielectric Constant (tuHDC) Ceramic Technique to Largely Improve RF Coil Efficiency and MR Imaging Performance.IEEE transactions on medical imaging · 2020Article
- Ceramic resonators for targeted clinical magnetic resonance imaging of the breast.Nature communications · 2020Article
- Toward whole-cortex enhancement with an ultrahigh dielectric constant helmet at 3T.Magnetic resonance in medicine · 2020Article
- Disentangling the effects of high permittivity materials on signal optimization and sample noise reduction via ideal current patterns.Magnetic resonance in medicine · 2019Article
- Quantitative imaging of brain energy metabolisms and neuroenergetics using in vivo X-nuclearJournal of magnetic resonance (San Diego, Calif. : 1997) · 2018Review
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Authors and funding
5 authors.
Funding
Abstract
purposeIncorporating high dielectric constant (HDC) materials into radiofrequency (RF) coils has been shown to effectively improve RF coil performance at 7 and 3 T because of the induced displacement current in the high dielectric constant materials. The displacement current is proportional to the RF field frequency and permittivity of the material. The aim of this paper is to investigate the effect of high dielectric constant materials with even greater permittivity on the RF field at 1.5 T and 3 T.
methodsSeveral monolithic ceramic materials with an ultrahigh dielectric constant ranging from 1200 to 3300 were investigated at 1.5 T and 3 T with phantom and human brain imaging along with computer modeling.
resultsExperimental measurements in phantom studies showed a significant enhancement of signal-to-noise ratio (50-100%) and strong transmission power reduction (3-27-fold). Under suboptimal experimental conditions in this study, the signal-to-noise ratio in the human brain cortex was nearly doubled, which produced high-resolution image without the associated stronger magnetic susceptibility artifacts and elevated specific absorption rate concerns at higher field strengths.
conclusionsUse of ultrahigh dielectric constant ceramic materials is a simple and low-cost approach that could further improve the RF technology to maximize image signal-to-noise ratio and reduce RF energy deposition for human studies. Magn Reson Med 79:2842-2851, 2018. © 2017 International Society for Magnetic Resonance in Medicine.
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