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Abstract #0979

Highly Efficient Square Wave Distant Dipolar Field and Its Applications for in Vivo MRI

Zhong Chen1, Congbo Cai1, Shuhui Cai1, Jianhui Zhong2

1Departments of Physics and Communication Engineering, Fujian Key Laboratory of Plasma and Magnetic Resonance, Xiamen University, Xiamen, Fujian, China; 2Departments of Radiology and Biomedical Engineering, University of Rochester, Rochester, NY, United States

The iMQC signal intensity can be enhanced by replacing the conventional sinusoidal distant dipolar field (DDF) with square wave DDF. In this abstract, instead of a series of adiabatic inversion pulses proposed previously, a more efficient composite adiabatic inversion pulse was applied to create square wave DDF. The square wave DDF was applied to MR imaging for the first time. The experimental results show that using the proposed square wave DDF in the ZEBRA sequence can enhance the iMQC signal intensity by about 1.5 times in comparison to the conventional CRAZED sequence.