Synchronous 1 H and 23 Na dual-nuclear MRI on a clinical MRI system, equipped with a time-shared second transmit channel
Joshua D Kaggie 1,2 , Nabraj Sapkota 1,2 , Kyle Jeong 2 , Xianfeng Shi 3 , Glen R Morrell 1 , Neal K Bangerter 1,4 , and Eun-Kee Jeong 1
Utah Center for Advanced Imaging Research,
Radiology, University of Utah, Salt Lake City, UT,
University of Utah, Salt Lake City, UT, United States,
Brain Institute and Department of Psychiatry, University
of Utah, UT, United States,
and Computer Engineering, Brigham Young University, UT,
This study acquires proton and sodium images within the
same sequence at 3T, without internal modification of
the clinical hardware. Proton GRE and SE MR images were
separately acquired, synchronously with 23Na GRE images.
To overcome scanner limitations: the 1H/23Na transmit
pulses were interleaved; additional hardware was added
to the scanner to down-convert the 1H signal, so that
both the 23Na and 1H signal were acquired at 23Na
frequency through the scanner; the sequence allowed
multiple 23Na acquisitions to occur between 1H
acquisitions for 1H SE imaging. Both phantom and in vivo
1H/23Na synchronous images were obtained.
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