A 15-channel receive array and 16 channel detunable transmit coil for human 
brain imaging at 9.4 T

Shajan, G; Hoffmann, J; Pohmann, R

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A 15-channel receive array and 16 channel detunable transmit coil for human brain imaging at 9.4 T

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Shajan, G
Department High-Field Magnetic Resonance, Max Planck Institute for Biological Cybernetics, Max Planck Society;

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Hoffmann, J
Department High-Field Magnetic Resonance, Max Planck Institute for Biological Cybernetics, Max Planck Society;

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Pohmann, R
Department High-Field Magnetic Resonance, Max Planck Institute for Biological Cybernetics, Max Planck Society;

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引用

Shajan, G., Hoffmann, J., & Pohmann, R. (2011). A 15-channel receive array and 16 channel detunable transmit coil for human brain imaging at 9.4 T. Poster presented at 19th Annual Meeting and Exhibition of the International Society for Magnetic Resonance in Medicine (ISMRM 2011), Montréal, Canada.

引用: https://hdl.handle.net/11858/00-001M-0000-0013-BBE8-2

要旨

The radio frequency (RF) magnetic field (B1) distribution becomes more complex in MR experiments employing higher static magnetic field (B0) due to shorter wavelength in tissue. The B1 + inhomogeneities from a predefined volume of interest is reduced by influencing the amplitude and phase of the transmit current on a transceiver array coil [1, 2]. Significant gains in SNR was achieved at 7T using 32 channel receive arrays assembled on close fitting formers [3, 4]. In this study, we combine the benefits of these two methods for human brain MRI at 9.4T (400MHz). Our imaging setup consists of a 15-element receive array together with a 16-element actively detunable transmit array and hence the additional flexibility to employ RF shimming methods.