Abstract #2602

Design of 5-channel On-coil Shimming Coil for Rat Brain MRI Guided High Intensity Focused Ultrasound: a preliminary study

Jo Lee¹, Jianhong Wen¹, Chao Zou¹, Xiaoqing Hu¹, Xiaoliang Zhang^2,3, Xin Liu¹, and Ye Li¹

¹Lauterbur Imaging Research Center, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen City, People's Republic of China, ²Department of Radiology and Biomedical Imaging, University of California San Francisco, CA, United States, ³UCSF/UC Berkeley Joint Graduate Group in Bioengineering, San Francisco, CA, United States

Signal-to-noise ratio (SNR) and homogeneity of the static magnetic field B0 are critically important in achieving accurate temperature measurement for MRI guided HIFU. In this work, a 5-channel shimming coil on the top of a 3-channel RF coil array at 3T has been fabricated to increase the B0 homogeneity and the SNR in region of interest. Phantom studies have demonstrated the the capability of the proposed shimming coil to improve B0 homogeneity and SNR of the images, which will lead to accurate temperature mapping.

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