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Abstract #1697

2D Radial Sodium MRI Using VERSE

Simon Konstandin1, Lothar R. Schad1

1Computer Assisted Clinical Medicine, Heidelberg University, Mannheim, Germany

Minimal echo times are required for sodium MRI with a fast biexponential transversal decay. The RF pulse duration of slice-selective excitation is limited by gradient slew rate, amplitude, and RF peak power. The minimal necessary RF pulse duration was investigated, depending on flip angle and reference voltage of the coil using different VERSE approaches and Fermi-shaped RF pulses. Sodium heart measurements are shown to demonstrate SNR changes in myocardium due to different minimal echo times.

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Keywords

abdominal advantage allowed amplitude anisotropic applied approaches array assisted avoiding bandwidth benefit biomedical birdcage blood blurred body broadening cartilage caused chosen clinical coil coils component components computer considering constraints decay decrease decreased depending design double drop duration durations efficiency enabling energy equal especially excitation fast filter gain gains geometry gradient hardware head heart highest implemented integral intrinsic investigated latter leads lengths limited limiting medicine minimal minimized myocardium nearly necessary normalized optimal otherwise partial peak plus possesses power preferred product profile projections proportional proposed pulse pulses radial radiology rapid reached readout real receive rectangular repetition required resolution resolutions scanner selective shape shaped shapes short shortening shorter shortest simple simulated simulations since slew slice slow smoother sodium speed still strong strongly studies subject surface trans transfer transmit transmitter transversal triggering trio tuned types verse voltage voltages volume waveforms whole zero