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Abstract #0874

Experimental Comparisons of MRF-FISP Using Optimized Fractional Dictionary and B1 Correction

Lixian Zou1,2, Huihui Ye3, Shi Su1, Haifeng Wang1, Dong Liang1,4, Xin Liu1, and Hairong Zheng1
1Shenzhen Institutes of Advanced Technology,Chinese Academy of Sciences, Shenzhen, China, 2Shenzhen College of Advanced Technology, University of Chinese Academy of Sciences, Shenzhen, China, 3State Key Laboratory of Modern Optical Instrumentation, College of Optical Science and Engineering, Zhejiang University, Zhejiang, China, 4Research Center for Medical AI, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, China

MRF is a time-efficient technique to simultaneously measure of multiple parameters through pattern recognition. The completeness of dictionary to describe the signal evolution process in NMR system is very important to acquire the accurate T1 and T2 values. A new dictionary, generated by using fractional Bloch equations and B1 correction, is proposed to improve the MRF-FISP accuracy. In this work, we compared the accuracy of relaxation values with three dictionary models through phantom and in-vivo experiments. Results illustrated that dictionary generated through fractional Bloch equation with B1 correction is the best to approach T1 and T2 standards.

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