ArticleMagma (New York, N.Y.)2016
Electrodynamics and radiofrequency antenna concepts for human magnetic resonance at 23.5 T (1 GHz) and beyond.
Article in Magma (New York, N.Y.), 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 18 papers.
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Who cites it
18 citing papers in PubMed.
- A Numerical Alternative to MR Thermometry for Safety Validation of Multi-Channel RF Transmit Coils.Magnetic resonance in medicine · 2026Article
- 3D Metamaterials Facilitate Human Cardiac MRI at 21.0 Tesla: A Proof-of-Concept Study.Sensors (Basel, Switzerland) · 2025Article
- Advanced Radio Frequency Applicators for Thermal Magnetic Resonance Theranostics of Brain Tumors.Cancers · 2023Article
- Scaling the mountains: what lies above 7 Tesla magnetic resonance?Magma (New York, N.Y.) · 2023Article
- Germany's journey toward 14 Tesla human magnetic resonance.Magma (New York, N.Y.) · 2023Review
- A 16-Channel Dipole Antenna Array for Human Head Magnetic Resonance Imaging at 10.5 Tesla.Sensors (Basel, Switzerland) · 2021Article
- Article
- Assessment of radio-frequency heating of a parallel transmit coil in a phantom using multi-echo proton resonance frequency shift thermometry.Magnetic resonance imaging · 2021Article
- In vivo human head MRI at 10.5T: A radiofrequency safety study and preliminary imaging results.Magnetic resonance in medicine · 2020Article
- Article
- Controlled Release of Therapeutics from Thermoresponsive Nanogels: A Thermal Magnetic Resonance Feasibility Study.Cancers · 2020Article
- Solving the Time- and Frequency-Multiplexed Problem of Constrained Radiofrequency Induced Hyperthermia.Cancers · 2020Article
- An analytic expression for the ultimate intrinsic SNR in a uniform sphere.Magnetic resonance in medicine · 2018Article
- RF pulse methods for use with surface coils: Frequency-modulated pulses and parallel transmission.Journal of magnetic resonance (San Diego, Calif. : 1997) · 2018Review
- Review
- Open Source 3D Multipurpose Measurement System with Submillimetre Fidelity and First Application in Magnetic Resonance.Scientific reports · 2017Article
- Toward imaging the body at 10.5 tesla.Magnetic resonance in medicine · 2017Article
- From ultrahigh to extreme field magnetic resonance: where physics, biology and medicine meet.Magma (New York, N.Y.) · 2016Article
Corrections and comments
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Authors and funding
2 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
objectiveThis work investigates electrodynamic constraints, explores RF antenna concepts and examines the transmission fields (B 1 (+) ) and RF power deposition of dipole antenna arrays for (1)H magnetic resonance of the human brain at 1 GHz (23.5 T). MATERIALS AND
methodsElectromagnetic field (EMF) simulations are performed in phantoms with average tissue simulants for dipole antennae using discrete frequencies [300 MHz (7.0 T) to 3 GHz (70.0 T)]. To advance to a human setup EMF simulations are conducted in anatomical human voxel models of the human head using a 20-element dipole array operating at 1 GHz.
resultsOur results demonstrate that transmission fields suitable for (1)H MR of the human brain can be achieved at 1 GHz. An increase in transmit channel density around the human head helps to enhance B 1 (+) in the center of the brain. The calculated relative increase in specific absorption rate at 23.5 versus 7.0 T was below 1.4 (in-phase phase setting) and 2.7 (circular polarized phase setting) for the dipole antennae array.
conclusionThe benefits of multi-channel dipole antennae at higher frequencies render MR at 23.5 T feasible from an electrodynamic standpoint. This very preliminary finding opens the door on further explorations that might be catalyzed into a 20-T class human MR system.
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