Zack Thompson1,2, Dean Darnell1,2, Darya Morozov3, Scott C Beeman3,4, Allen W Song1,2, and Trong-Kha Truong1,2
1Medical Physics Graduate Program, Duke University, Durham, NC, United States, 2Brain Imaging and Analysis Center, Duke University, Durham, NC, United States, 3Biomedical Magnetic Resonance Laboratory, Washington University in St. Louis, St. Louis, MO, United States, 4School of Biological and Health Systems Engineering, Arizona State University, Tempe, AZ, United States
1Medical Physics Graduate Program, Duke University, Durham, NC, United States, 2Brain Imaging and Analysis Center, Duke University, Durham, NC, United States, 3Biomedical Magnetic Resonance Laboratory, Washington University in St. Louis, St. Louis, MO, United States, 4School of Biological and Health Systems Engineering, Arizona State University, Tempe, AZ, United States
The
optimal iPRES rat coil design had four iPRES(2) coil elements split into two shim loops
and wrapped around a cylinder with a 2-mm overlap in the azimuthal direction, resulting
in a 54.2% lower B0 root-mean-square error and a high and uniform SNR.
FIGURE
2 : B0
maps (Hz) in a representative slice of a rat brain at 7T before (top left)
and after whole-brain (top right) or slice-optimized (middle and bottom rows)
shimming with the iPRES(N) coil
designs shown in Figure 1 and with a DC current limit of 0.4 A.
FIGURE 4: 1x4 iPRES(2)-Azimuthal coil design with an optimal overlap
of 2 mm between adjacent coil elements, showing a high and uniform SNR over the
cylindrical water phantom.
