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Abstract #2800

Flexible Radiative Antennas as Transmit Elements for High Field MRI

Sebastian Arnold Aussenhofer1, Andrew G. Webb2

1Department of Radiology, Leiden University Medical Center , C.J.Gorter Center for High Field MRI, Leiden, Zuid-Holland, Netherlands; 2Department of Radiology, Leiden University Medical Center, C.J.Gorter Center for High Field MRI, Leiden, Zuid-Holland, Netherlands

A design for a flexible radiative antenna as a high field transmit element is presented, based on high permittivity liquids. This design produces a plane wave in tissue, which simplifies B1 shimming. The flexibility is designed for patient comfort and to work with different body sizes. An array of loop coils is used for signal reception. in vivo results are shown from the ankle of a healthy volunteer.

Keywords

absorption advantage advantages ankle antenna antennas around array arrays basic best block blocks board body bottom capacitive cavity ceramic channel coil coils combines comfortable concept considered constant copper deformable design designs detuning dielectric dipole disadvantage doping easily elbow electromagnetic electronic element elements enough entering etched even expensive extended extremely extremity field flexible frame friendly geometry glycerol gradient hard healthy heavy hold homebuilt human implemented individual initial latter length liquids loaded loop loops manufacture matched matching material medical metal mounted much network opposite overlapping paramagnetic particular particularly parts passive patient perpendicular photograph placed planar plated proposed radiation radiative radiology radius raised receive recently reception reduced reduction replaced residual rigid shimming sideways sigma slice slices solution substrates suitable suited support surface suspensions system thick transmit viscous volumes volunteer water wave waveform wrist