ArticleMagma (New York, N.Y.)2015
Active decoupling of RF coils using a transmit array system.
Article in Magma (New York, N.Y.), 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 5 papers.
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Who cites it
5 citing papers in PubMed.
- Magnetic resonance imaging.Science advances · 2026Review
- Dual-Channel Transverse Fields Radiofrequency Coils for 1.5 T Magnetic Resonance Imaging.Sensors (Basel, Switzerland) · 2024Article
- RF-induced heating of interventional devices at 23.66 MHz.Magma (New York, N.Y.) · 2023Article
- Design of an Intraoral Dipole Antenna for Dental Applications.IEEE transactions on bio-medical engineering · 2021Article
- In vivo MRI with Concurrent Excitation and Acquisition using Automated Active Analog Cancellation.Scientific reports · 2018Article
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Authors and funding
3 authors.
Funding
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Abstract
objectiveImplementation of a decoupling method for isolation of transmit and receive radio frequency (RF) coils for concurrent excitation and acquisition (CEA) MRI in samples with ultra-short T2*. MATERIALS AND
methodsThe new phase and amplitude (PA) decoupling method is implemented in a clinical 3T-MRI system equipped with a parallel transmit array system. For RF excitation, two transmit coils are used in combination with a single receive coil. The transmit coil is geometrically decoupled from the receive coil, and the remaining B 1-induced voltages in the receive coil during CEA are minimized by the second transmit coil using a careful adjustment of the phase and amplitude settings in this coil. Isolation of the decoupling scheme and transmit noise behavior are analyzed for different loading conditions, and a CEA MRI experiment is performed in a rubber phantom with sub-millisecond T2* and in an ex vivo animal.
resultsGeometrical (20 dB) and PA decoupling (50 dB) provided a total isolation of 70 dB between the transmit and receive coils. Integration of a low-noise RF amplifier was necessary to minimize RF transmit noise. CEA MR images could be reconstructed from a rubber phantom and an ex vivo animal.
conclusionCEA MRI can be implemented in clinical MRI systems using active decoupling with parallel transmit array capabilities with minor hardware modifications.
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