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Runderkamp et al., 2024 - Google Patents

Whole‐liver flip‐angle shimming at 7 T using parallel‐transmit k T‐point pulses and Fourier phase‐encoded DREAM B 1+ mapping

Runderkamp et al., 2024

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Document ID
13568111178167586550
Author
Runderkamp B
Roos T
van der Zwaag W
Strijkers G
Caan M
Nederveen A
Publication year
Publication venue
Magnetic resonance in medicine

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Snippet

Purpose To obtain homogeneous signal throughout the human liver at 7 T. Flip angle (FA) shimming in 7T whole‐liver imaging was performed through parallel‐transmit kT‐point pulses based on subject‐specific multichannel absolute B 1+ B _1^+ maps from Fourier …
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    • G01R33/44Arrangements or instruments for measuring magnetic variables involving magnetic resonance using nuclear magnetic resonance [NMR]
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    • G01R33/56Image enhancement or correction, e.g. subtraction or averaging techniques, e.g. improvement of signal-to-noise ratio and resolution
    • G01R33/561Image enhancement or correction, e.g. subtraction or averaging techniques, e.g. improvement of signal-to-noise ratio and resolution by reduction of the scanning time, i.e. fast acquiring systems, e.g. using echo-planar pulse sequences
    • G01R33/5611Parallel magnetic resonance imaging, e.g. sensitivity encoding [SENSE], simultaneous acquisition of spatial harmonics [SMASH], unaliasing by Fourier encoding of the overlaps using the temporal dimension [UNFOLD], k-t-broad-use linear acquisition speed-up technique [k-t-BLAST], k-t-SENSE
    • G01R33/5612Parallel RF transmission, i.e. RF pulse transmission using a plurality of independent transmission channels
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    • G01R33/565Correction of image distortions, e.g. due to magnetic field inhomogeneities
    • G01R33/56518Correction of image distortions, e.g. due to magnetic field inhomogeneities due to eddy currents, e.g. caused by switching of the gradient magnetic field
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    • G01R33/5615Echo train techniques involving acquiring plural, differently encoded, echo signals after one RF excitation, e.g. using gradient refocusing in echo planar imaging [EPI], RF refocusing in rapid acquisition with relaxation enhancement [RARE] or using both RF and gradient refocusing in gradient and spin echo imaging [GRASE]
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