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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