Alireza Sadeghi-Tarakameh1, Bahram Khalichi2, Xiaoping Wu1, Gregory J. Metzger1, and Yigitcan Eryaman3
1Center for Magnetic Resonance Research (CMRR), University of Minnesota, Minneapolis, MN, United States, 2Department of Electrical and Electronics Engineering, Bilkent University, Ankara, Turkey, 3University of Minnesota, Minneapolis, MN, United States
1Center for Magnetic Resonance Research (CMRR), University of Minnesota, Minneapolis, MN, United States, 2Department of Electrical and Electronics Engineering, Bilkent University, Ankara, Turkey, 3University of Minnesota, Minneapolis, MN, United States
In this work, we optimize a previously introduced antenna (NODES) to improve its SNR and SAR performances for 7T cardiac MRI applications.
Figure 4. Transmit performance of the two arrays. First
row: An axial view of B1+-maps obtained by 3D
phase-only shimming over the heart with maximum homogeneity constraint. Second
row: A coronal view of the B1+-maps obtained by the
same shimming solution. Third row: Anterior and posterior views of the
10g-averaged SAR caused by the same shimming solution. The input power level was
adjusted to achieve the average 1µT B1+ over the heart.
Figure 2.Coronal
and sagittal views from the formation of 16-channel 1D loop-dipole and 2D NODESRx
over the anterior and posterior sides of a realistic human body model in the EM
simulation environment. These EM simulations were used for evaluation of the
transmit and receive performances of the two arrays in cardiac imaging at 7T.
