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Abstract #1309

Optimization of B1 field homogeneity along the longitudinal direction for 7T MTL resonators by using a multi-row design

Xinqiang Yan 1,2 , Xiaoliang Zhang 3,4 , Chuangxin Ma 2 , Long Wei 2 , and Rong Xue 1

1 State Key Laboratory of Brain and Cognitive Science, Beijing MRI Center for Brain Research, Insititute of Biophysics, Chinese Academy of Sciences, Beijing, Beijing, China, 2 Key Laboratory of Nuclear Analysis Techniques, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, Beijing, China, 3 Department of Radiology and Biomedical Imaging, University of California San Francisco, San Francisco, California, United States, 4 UCSF/UC Berkeley Joint Graduate Group in Bioengineering, San Francisco, California, United States

In this work, we used a double-row microstrip transmission line (MTL) array by varying the termination capacitance distribution to generate more homogeneous B1+ field along longitudinal direction. The coupling between elements of adjacent rows was reduced by using the induced current compensation decoupling method. Full-wave electromagnetic modeling was used to study and compare the performances of the new design and the conventional MTL resonator. The B1+ homogeneity improvement along longitudinal direction was obvious and this new design has also paved the way for similar designs for human imaging.

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