Design of a 5-channel local B0 shimming coil for rat brain imaging at 3T
Qiaoyan Chen1,2, Chao Luo1,2, Xiaoliang Zhang3, Xin Liu1,2, Hairong Zheng1,2, and Ye Li1,2
1Paul C. Lauterbur Research Center for Biomedical Imaging, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, China, 2Key Laboratory for Magnetic Resonance and Multimodality Imaging of Guangdong Province, Shenzhen, China, 3Department of Biomedical Engineering, State University of New York at Buffalo, New York, NY, United States
To improve B0 magnetic field homogeneity and minimize interferences on RF coils, local shimming coils with a few channel number can be applied. In this study, we designed and constructed a 5-channel local B0 shimming coil for the rat brain. There was a marginal SNR loss within 5% after converting the local shimming coil into a 3-channel RF coil. The reduction of B0 inhomogeneity for the rat brain with respect to the basic set was about 34%. A large portion of the distortion in EPI images was recovered and some image artifacts were eliminated after using the local shimming coil.
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