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Higher strength main magnets and more demanding pulse sequences have driven interest in parallel excitation systems. Parallel transmit array coils need to be decoupled to be used effectively. Ultra-low output impedance power amplifiers have been proposed as a possible solution for this. They provide decoupling in a manner analogous to low input impedance preamplifiers. Chu et al suggest a tuning method...
Parallel transmit technology for magnetic resonance imaging can mitigate the challenges with the transmit field (B1) inhomogeneity and capture the increased signal-to-noise ratio benefit at high field strengths. Most of the available parallel transmit systems use conventional amplifier architectures with array coils that employ complex decoupling methods to isolate the individual elements. Current...
A multilayered surface coil array for magnetic resonance imaging with an improved signal-to-noise ratio (SNR) performance is introduced and investigated by a simulation study. By using an effective decoupling method, the strong mutual coupling effect between the coil layers can be accurately removed, leading to a coherent combination of the signals of the individual coils. This results in a much stronger...
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